CCNA DISCOVERY 1.9

CCNA Discovery 1 Module 9 Exam Answers Version 4.0
1. What should a network administrator do first after receiving a call from a user who cannot access the company web server?
• Reboot the web server.
• Replace the NIC of the computer.
• Ask the user to log off and log on again.
• Ask the user what URL has been typed and what error message displays.

2. A customer called the cable company to report that the Internet connection is unstable. After trying several configuration changes, the technician decided to send the customer a new cable modem to try. What troubleshooting technique does this represent?
• top-down
• bottom-up
• substitution
• trial-and-error
• divide-and-conquer

3. Only one workstation on a particular network cannot reach the Internet. What is the first troubleshooting step if the divide-and-conquer method is being used?
• Check the NIC, and then check the cabling.
• Check the workstation TCP/IP configuration.
• Test all cables, and then test layer by layer up the OSI model.
• Attempt to Telnet, and then test layer by layer down the OSI model.

4. Which two troubleshooting techniques are suitable for both home networks and large corporate networks? (Choose two.)
• having a backup ISR
• running network monitoring applications
• documenting the troubleshooting process
• keeping a record of system upgrades and software versions
• keeping spare switches, routers, and other equipment available 

5. Identify two physical-layer network problems. (Choose two.)
• hardware failure
• software configuration
• devices not able to ping
• loose cable connections
• device driver configuration

6. Which ipconfig command requests IP configuration from a DHCP server?
• ipconfig
• ipconfig /all
• ipconfig /renew
• ipconfig /release

7. What command is used to determine the location of delay for a packet traversing the Internet?
• ipconfig
• netstat
• nslookup
• ping
• tracert

8. What command is used to determine if a DNS server is providing name resolution?
• ipconfig
• netstat
• nslookup
• tracert
9. Which troubleshooting method begins by examining cable connections and wiring issues?
• top-down
• bottom-up
• substitution
• divide-and-conquer

10. A technician suspects that a Linksys integrated router is the source of a network problem. While troubleshooting, the technician notices a blinking green activity LED on some of the ports. What does this indicate?
• Self-diagnostics have not completed.
• The power supply is the source of the problem.
• The ports are operational and are receiving traffic.
• The ports are operational, but no traffic is flowing.
• There are no cables plugged into those ISR ports.
• The ports have cables plugged in, but they are not functional.

11. A PC is plugged into a switch and is unable to connect to the network. The UTP cable is suspected. What could be the problem?
• A straight-through cable is being used
• The connectors at both ends of the cable are RJ-45.
• The RJ-45 connectors are crimped onto the cable jacket.
• A crossover cable is being used.

12. Refer to the graphic. What configuration is incorrect in the network shown?
• The host IP address is incorrect.
• The host subnet mask is incorrect.
• The host default gateway is incorrect.
• The wired connection is the wrong type of cable.
• The Linksys integrated router does not support wireless. 

13. Which three settings must match on the client and access point for a wireless connection to occur? (Choose three.)
• SSID
• authentication
• MD5 checksum
• antennae type
• encryption key
• MAC address filters

14. A technician is troubleshooting a security breach on a new wireless access point. Which three configuration settings make it easy for hackers to gain access? (Choose three.)
• configuring NAT
• broadcasting the SSID
• using open authentication
• enabling MAC address filters
• using the default internal IP address
• using DHCP to provide IP addresses

15. Refer to the graphic. The wireless host cannot access the Internet, but the wired host can. What is the problem?
• The host WEP key is incorrect.
• The host IP address is incorrect.
• The host subnet mask is incorrect.
• The host default gateway is incorrect.
• The integrated router internal IP address is incorrect.
• The integrated router Internet IP address is incorrect.

16. Refer to the graphic. What configuration is incorrect in the network shown?
• The host IP address is incorrect.
• The host subnet mask is incorrect.
• The host default gateway is incorrect.
• The wired connection is the wrong type of cable.
• The Linksys integrated router does not support wireless.

17. When acting as a DHCP server, what three types of information can an ISR provide to a client? (Choose three.)
• physical address
• MAC address
• default gateway
• static IP address
• dynamic IP address
• DNS server address

18. What two items could be checked to verify connectivity between the router and the ISP? (Choose two.)
• router status page
• wireless card settings
• router operating system version
• local host operating system version
• connectivity status as indicated by LEDs

19. A technician is unsuccessful in establishing a console session between a PC and a Linksys integrated router. Both devices have power, and a cable is connected between them. Which two troubleshooting steps could help to diagnose this problem? (Choose two.)
• Ensure the correct cable is used.
• Ensure the SSID is the same on both devices.
• Ensure both devices have the same IP address.
• Ensure both devices have different subnet masks.
• Ensure the encryption type on both devices match.
• Ensure the link status LED on the integrated router is lit.

20. Network baselines should be performed in which two situations? (Choose two.)
• after the network is installed and running optimally
• after a virus outbreak is discovered on the network
• after major changes are implemented on the network
• after several computers are added to the network
• at the end of the work week

21. Typically, help desk personnel assist end users in which two tasks? (Choose two.)
• identifying when the problem occurred
• determining if other users are currently logged into the computer
• updating network diagrams and documentation
• implementing the solution to the problem
• running a network baseline test
• determining the cost of fixing the problem

22. How does remote-access software help in the troubleshooting process?
• Remote access uses a live chat feature.
• Users have to be present so that they can view LEDs and change cables if necessary.
• Diagnostics can be run without a technician being present at the site.
• FAQs can be consulted more easily.

23. Which two items should be added to the documentation following a troubleshooting event? (Choose two.)
• final resolution
• repetitive measures
• number of people involved in the problem
• accurate current network infrastructure diagrams
• results of successful and unsuccessful troubleshooting steps

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CCNA DISCOVERY 1.8

CCNA Discovery 1 Module 8
1. Identify three techniques used in social engineering. (Choose three.)
• fishing
• vishing
• phishing
• spamming
• pretexting
• junk mailing
2. During a pretexting event, how is a target typically contacted?
• by e-mail
• by phone
• in person
• through another person
3. While surfing the Internet, a user notices a box claiming a prize has been won. The user opens the box unaware that a program is being installed. An intruder now accesses the computer and retrieves personal information. What type of attack occurred?
• worm
• virus
• Trojan horse
• denial of service
4. What is a major characteristic of a Worm?
• malicious software that copies itself into other executable programs
• tricks users into running the infected software
• a set of computer instructions that lies dormant until triggered by a specific event
• exploits vulnerabilities with the intent of propagating itself across a network
5. A flood of packets with invalid source-IP addresses requests a connection on the network. The server busily tries to respond, resulting in valid requests being ignored. What type of attack occurred?
• Trojan horse
• brute force
• ping of death
• SYN flooding

6. What type of advertising is typically annoying and associated with a specific website that is being visited?
• adware
• popups
• spyware
• tracking cookies
7. What is a widely distributed approach to marketing on the Internet that advertises to as many individual users as possible via IM or e-mail?
• brute force
• spam
• spyware
• tracking cookies
8. What part of the security policy states what applications and usages are permitted or denied?
• identification and authentication
• remote access
• acceptable use
• incident handling
9. Which statement is true regarding anti-virus software?
• Only e-mail programs need to be protected.
• Only hard drives can be protected.
• Only after a virus is known can an anti-virus update be created for it.
• Only computers with a direct Internet connection need it.
10. Which two statements are true concerning anti-spam software? (Choose two.)
• Anti-spam software can be loaded on either the end-user PC or the ISP server, but not both.
• When anti-spam software is loaded, legitimate e-mail may be classified as spam by mistake.
• Installing anti-spam software should be a low priority on the network.
• Even with anti-spam software installed, users should be careful when opening e-mail attachments.
• Virus warning e-mails that are not identified as spam via anti-spam software should be forwarded to other users immediately.
11. What term is used to describe a dedicated hardware device that provides firewall services?
• server-based
• integrated
• personal
• appliance-based

12. Which acronym refers to an area of the network that is accessible by both internal, or trusted, as well as external, or untrusted, host devices?
• SPI
• DMZ
• ISR
• ISP
13. Which statement is true about port forwarding within a Linksys integrated router?
• Only external traffic that is destined for specific internal ports is permitted. All other traffic is denied.
• Only external traffic that is destined for specific internal ports is denied. All other traffic is permitted.
• Only internal traffic that is destined for specific external ports is permitted. All other traffic is denied.
• Only internal traffic that is destined for specific external ports is denied. All other traffic is permitted.
14. To which part of the network does the wireless access point part of a Linksys integrated router connect?
• DMZ
• external
• internal
• a network other than the wired network
15. Refer to the graphic. What is the purpose of the Internet Filter option of Filter IDENT (Port 113. on the Linksys integrated router?
• to require a user ID and password to access the router
• to prevent outside intruders from attacking the router through the Internet
• to require a pre-programmed MAC address or IP address to access the router
• to disable tracking of internal IP addresses so they cannot be spoofed by outside devices
16. What statement is true about security configuration on a Linksys integrated router?
• A DMZ is not supported.
• The router is an example of a server-based firewall.
• The router is an example of an application-based firewall.
• Internet access can be denied for specific days and times.

17. What environment would be best suited for a two-firewall network design?
• a large corporate environment
• a home environment with 10 or fewer hosts
• a home environment that needs VPN access
• a smaller, less congested business environment
18. What is one function that is provided by a vulnerability analysis tool?
• It provides various views of possible attack paths.
• It identifies missing security updates on a computer.
• It identifies wireless weak points such as rogue access points.
• It identifies all network devices on the network that do not have a firewall installed.
• It identifies MAC and IP addresses that have not been authenticated on the network.
19. Many best practices exist for wired and wireless network security. The list below has one item that is not a best practice. Identify the recommendation that is not a best practice for wired and wireless security.
• Periodically update anti-virus software.
• Be aware of normal network traffic patterns.
• Periodically update the host operating system.
• Activate the firewall on a Linksys integrated router.
• Configure login permissions on the integrated router.
• Disable the wireless network when a vulnerability analysis is being performed.
20. What best practice relates to wireless access point security?
• activation of a popup stopper
• a change of the default IP address
• an update in the antivirus software definitions
• physically securing the cable between the access point and client
21. Refer to the graphic. In the Linksys Security menu, what does the SPI Firewall Protection option Enabled provide?
• It prevents packets based on the application that makes the request.
• It allows packets based on approved internal MAC or IP addresses.
• It requires that packets coming into the router be responses to internal host requests.
• It translates an internal address or group of addresses into an outside, public address

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CCNA DISCOVERY 1.7

CCNA Discovery 1 Module 7 Exam Answers Version 4.0

1. Why is IEEE 802.11 wireless technology able to transmit further distances than Bluetooth technology?
• transmits at much lower frequencies
• has higher power output
• transmits at much higher frequencies
• uses better encryption methods

2. What are three advantages of wireless over wired technology? (Choose three.)
• more secure
• longer range
• anytime, anywhere connectivity
• easy and inexpensive to install
• ease of using licensed air space
• ease of adding additional devices

3. What are two benefits of wireless networking over wired networking? (Choose two.)
• speed
• security
• mobility
• reduced installation time• allows users to share more resources
• not susceptible to interference from other devices

4. A technician has been asked to provide wireless connectivity to the wired Ethernet network of a building. Which three factors affect the number of access points needed? (Choose three.)
• the size of the building
• the number of solid interior walls in the building
• the presence of microwave ovens in several offices
• the encryption method used on the wireless network
• the use of both Windows and Appletalk operating systems
• the use of shortwave or infrared on the AP

5. Why is security so important in wireless networks?
• Wireless networks are typically slower than wired networks.
• Televisions and other devices can interfere with wireless signals.
• Wireless networks broadcast data over a medium that allows easy access.
• Environmental factors such as thunderstorms can affect wireless networks.

6. What does the Wi-Fi logo indicate about a wireless device?
• IEEE has approved the device.
• The device is interoperable with all other wireless standards.
• The device is interoperable with other devices of the same standard that also display the Wi-Fi logo.
• The device is backwards compatible with all previous wireless standards.

7. Which statement is true concerning wireless bridges?
• connects two networks with a wireless link
• stationary device that connects to a wireless LAN
• allows wireless clients to connect to a wired network
• increases the strength of a wireless signal

8. Which WLAN component is commonly referred to as an STA?
• cell
• antenna
• access point
• wireless bridge
• wireless client
9. Which statement is true concerning an ad-hoc wireless network?
• created by connecting wireless clients in a peer-to-peer network• created by connecting wireless clients to a single, centralized AP
• created by connecting multiple wireless basic service sets through a distribution system
• created by connecting wireless clients to a wired network using an ISR

10. Refer to the graphic. In the Wireless menu option of a Linksys integrated router, what does the Network Mode option Mixed mean?
• The router supports encryption and authentication.
• The router supports both wired and wireless connections.
• The router supports 802.11b, 802.11g, and 802.11n devices.
• The router supports connectivity through infrared and radio frequencies.

11. Refer to the graphic. In the Wireless menu of a Linksys integrated router, what configuration option allows the presence of the access point to be known to nearby clients?
• Network Mode
• Network Name (SSID)
• Radio Band
• Wide Channel
• Standard Channel
• SSID Broadcast

12. Which two statements about a service set identifier (SSID) are true? (Choose two.)
• tells a wireless device to which WLAN it belongs
• consists of a 32-character string and is not case sensitive
• responsible for determining the signal strength
• all wireless devices on the same WLAN must have the same SSID
• used to encrypt data sent across the wireless network

13. Which two statements characterize wireless network security? (Choose two.)
• Wireless networks offer the same security features as wired networks.
• Wardriving enhances security of wireless networks.
• With SSID broadcast disabled, an attacker must know the SSID to connect.
• Using the default IP address on an access point makes hacking easier.
• An attacker needs physical access to at least one network device to launch an attack.

14. What type of authentication does an access point use by default?
• Open
• PSK
• WEP
• EAP

15. Which statement is true about open authentication when it is enabled on an access point?
• requires no authentication• uses a 64-bit encryption algorithm
• requires the use of an authentication server
• requires a mutually agreed upon password

16. What are two authentication methods that an access point could use? (Choose two.)
• WEP
• WPA
• EAP
• ASCII
• pre-shared keys

17. What is the difference between using open authentication and pre-shared keys?
• Open authentication requires a password. Pre-shared keys do not require a password.
• Open authentication is used with wireless networks. Pre-shared keys are used with wired networks.
• Pre-shared keys require an encrypted secret word. Open authentication does not require a secret word.
• Pre-shared keys require a MAC address programmed into the access point. Open authentication does not require this programming.

18. What term describes the encoding of wireless data to prevent intercepted data from being read by a hacker?
• address filtering
• authentication
• broadcasting
• encryption
• passphrase encoding

19. What access-point feature allows a network administrator to define what type of data can enter the wireless network?
• encryption
• hacking block
• traffic filtering
• MAC address filtering
• authentication

20. What are the two WEP key lengths? (Choose two.)
• 8 bit
• 16 bit
• 32 bit
• 64 bit
• 128 bit
21. Complete the following sentence: WEP is used to ______ , and EAP is used to _____ wireless networks.
• encrypt; authenticate users on
• filter traffic; select the operating frequency for
• identify the wireless network; compress data on
• create the smallest wireless network; limit the number of users on

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Lab 7.2.6 Configuring a Wireless Client

Required Equipment
One each of the following:
Access Point (AP)
Computer
Wireless Client Hardware
Checklist:
1. Unit
2. CD-ROM: User Guide
and Setup Guide
3. Ethernet Cable
4. Power Adapter (1 pc)
5. Quick Installation Book
*We will be using two different client models: Linksys WUSB54G and WUSB200. We will also help
connect attendees’ client PCs if they have different WLS client hardware.
Steps 1–3 Review (should already be done)
Step
1 Computer Ready
2 Open Linksys Access Point Box
3 AP Box Items Checklist
Linksys Wireless CCNA Setup
Step 4
Installation Guide Step: Connecting the Router (Layer 1 Only)
Connect Ethernet cable and plug from switchport on router to your NIC
DO NOT connect wirelessly to manage the router!
0T
s Router Lab 10 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public
Linksys Wireless CCNA Setup
Step 5
Usually use CD to go through easy install. (Skipping)
PC Configuration as per Installation Guide: Explore Variables,
“What Can Go Wrong…”
1. Many APs create a lot of noise
2. Some APs can manage over the wireless out of box but should only manage
through hardwired connection; DO NOT connect wirelessly to manage the router!
3. SSIDs are the same on all Linksys; we want to change in the beginning of the lab
4. All routers use the 192.168.1.1 address; reassign IP address based on what
given by speaker
**After changing SSID and IP, disconnect and reconnect to router
5. As long as SSIDs are changed, overlapping DHCP scope should not be a
problem
6. Some Windows desktops loose their network connections and/or SSID broadcast;
this is a Windows issue
7. WUSB clients CD out of the box does not work with VISTA; CD setups do not
work with Macintosh
8. Internet Explorer should be used for all the management
Step 6 – Lab
Router Configuration
Before beginning, everyone
reset the “firmware” button on
the router
Follow along lab 7.2.5
Reminder: Do not use wireless
connection for management
Menu
Generally Main menu – black bar
d sub menu – blue bar
Menu tour
Network Mode
SSID (change to last name)
Radio Band
Wide Channel
Standard Channel
SSID Broadcast
Change IP Address
Presenter gives out IP addresses to each
wireless router
ƒOther Options: Different Linksys Technology
Offerings
Step 7
Wireless Client Configuration
Follow along lab 7.2.6
or
For advanced users, use time
to investigate product menus
Lab details in 7.2.6
Finding APs
Finding SSID
Signal strength
Step 8
Basic Wireless Features
Highlighting key points
Radio Band
Wireless Network Name
Wireless Mode
Wide Channel
Standard Channel
Security
Authentication
Network Type
IP Address
Subnet Mask
Default Gateway
DNS1
MAC Address filtering
Step 9
9 View differences WRV200 to
WRT300N
Join another router’s SSID and insure
web management is enabled
Compare home series vs business
series for differences and similarities

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Lab 7.2.5 Configuring a Wireless Access Point

Objective

•Configure the wireless access point (AP) portion of a multi-function device to allow access to a wireless client.
Background / Preparation
The Linksys WRT300N includes an integrated 4-port switch, a router and a wireless Access Point (AP). In this lab, you will configure the AP component of the multi-function device to allow access for wireless clients. The basic wireless capabilities of the multi-function device will be configured but this will not be a secure wireless network. Setting up a secure wireless network will be covered in a later lab.
The following resources are required:
• Windows XP based computer that is cabled to the multi-function device
• Linksys WRT300N
Step 1: Verify connectivity between the computer and the multi-function device
a. The computer used to configure the AP should be attached to one of the multi-function device’s switch ports.
b. On the computer, click the Start button and select Run. Type cmd and click OK or press Enter.
c. At the command prompt, ping the multi-function device using the default IP address 192.168.1.1 or the IP that has been configured on the multi-function device’s port. Do not proceed until the ping succeeds.
d. Write down the command used to ping the multi-function device.
The answer : ping 192.168.1.1 -t
NOTE: If the ping is not successful, try these troubleshooting steps:
• Check to make sure the IP address of the computer is on the 192.168.1.0 network. The computer must be on the same network as the multi-function device to be able to ping it. The DHCP service ofthe multi-function device is enabled by default. If the computer is configured as a DHCP client itshould have a valid IP address and subnet mask. If the computer has a static IP address, it must be in on the 192.168.1.0 network and the subnet mask must be 255.255.255.0.
• Make sure the cable is a known-good straight-through cable. Test to verify.
• Verify that the link light for the port where the computer is attached is lit.
• Check whether the multi-function device has power.
If none of these steps correct the problem, check with your instructor.
Step 2: Log in to the multi-function device and configure the wireless network
a. Open a web browser. In the address line, type http://ip_address, where ip_address is the IP address
of the wireless router (default is 192.168.1.1). At the prompt, leave the user name textbox empty, but
type the password assigned to the router. The default password is admin. Click OK.
b. In the main menu, click on the Wireless option.
c. In the Basic Wireless Settings window, the Network Mode shows mixed by default, because the AP supports 802.11b, g, and n wireless devices. You can use any of these standards to connect to the AP. If the wireless portion of the multi-function device is NOT being used, the network mode would be set to Disabled. Leave the default of Mixed selected.
d. Delete the default SSID (linksys) in the Network Name (SSID) textbox. Enter a new SSID using your last name or name chosen by your instructor. SSIDs are case-sensitive.
e. Write down the exact SSID name that you are using. __________________________________
____________________________________________________________________________
f. Click on the Radio Band drop-down menu and write down the two options.
____________________________________________________________________________
g. For a wireless network that can use 802.11b, g, or n client devices, the default is Auto. Auto allows
the Wide Channel option to be chosen and gives the best performance. The Standard Channel
option is used if the wireless client devices are 802.11b or g, or both b and g. The Wide Channel
option is used if only 802.11n client devices are being used. Leave the default of Auto selected.
h. SSID Broadcast is set to enabled by default, which enables the AP to periodically send out the SSID
using the wireless antenna. Any wireless devices in the area can detect this broadcast. This is how
clients detect nearby wireless networks.
i. Click on the Save Settings button. When the settings have been successfully saved, click on
Continue.
j. The AP is now configured for a wireless network with the name (SSID) that you gave it. It is important
to write down this information before starting the next lab or attaching any wireless NICs to the
wireless network.

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CCNA Preparation Lab 6.2.4 Configuring an Email Client

Objectives
• Set up an email client.
• Send and receive mail from a mail server.
• Add an email account or change an existing one.

Background / Preparation
An email application gives the user the ability to send and receive messages from another user located on the same local network or on the Internet. The messages are sent by the sending client and stored on an email server. Another email client with a mailbox on the server can then access the server at any time to receive stored messages that are destined for that client.
The following resources are required:
• Windows-based computer with Internet connectivity
• Microsoft Outlook or other email client software

Step 1: Open Microsoft Outlook

1. From the Start menu, select All Programs. Locate the Microsoft Office software.
2. Select Microsoft Office Outlook as the email program. If your computer does not have the Microsoft Office software, there are many free email software packages available on the Internet. Search the Internet to find a free email client that can be installed on your computer. The following instructions may vary depending on your email client.

Step 2: Set up an email account

1. When you first start Microsoft Outlook, a screen appears with Email Upgrade Options. You can choose to import email messages or address books from another account. Because this is your first email account, select the Do Not Upgrade button.
2. The next screen is the Email Accounts screen where you are asked if you want to configure an email account. Click Yes.
3. If Outlook has already been installed and setup for e-mail previously, you can start the Outlook application and click Tools, E-Mail Accounts and then select View or change existing e-mail account to see how the existing account is set up.

Step 3: Enter POP3 e-mail account information

1. The next screen requires the user of the new account to fill in information. Enter your name and email address. Your can get your email address from your Internet provider.

NOTE: If you do not have a real ISP email account, this step can be treated as a simulation. Just enter the information requested to become familiar with the process of creating an email account.
2. Enter your server information. Contact your Internet provider to locate the server information for the incoming and outgoing mail servers. Usually Internet providers put this information on their website in their help section.
3. What is your incoming (POP3) mail server? POP3 (Mail server)
4. What is your outgoing (SMTP) mail server? SMTP (Mail Server)
5. Enter your username and password. Do not check the box to remember your password. This option is used when only one person uses the computer. If anyone else were to use the computer, they could easily gain access to all of the information in your email.
6. Click the Test Account Settings button. If everything is correct, the screen displays that the test was successful. If not, correct your information and try again.
NOTE: If this is a simulation, the test will not be successful and you can go to Steps 4 and 5.
7. Test your new account by sending an email to a friend in class.

Step 4: (Optional) Add another account or change an account

1. Open Microsoft Outlook. From the Tools menu, select Email Accounts.
2. In this screen, you can add another email account or you can change information in an existing account.

Step 5: Reflection

1. What are the advantages or disadvantages to using email over regular postal mail?
2. What are the advantages or disadvantages to using email over an instant messaging program?
3. With a partner, discuss five (5) recommendations for email etiquette that should be considered when emailing friends and business colleagues.

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CCNA Preparation Lab 6.2.3 Exploring FTP

Objective
• Demonstrate how to use FTP from the command prompt and GUI.

Background / Preparation
File Transfer Protocol (FTP) is part of the TCP/IP suite. FTP is used to transfer files from one network device to another network device. Windows includes an FTP application that you can execute from the command prompt. There are also many free GUI versions of FTP that you can download. The GUI versions are easier to use than typing from a command prompt.
When using FTP, one computer is normally the server and the other computer is the client. When accessing the server from the client, you need to provide a username and password. Some FTP servers have a userID named anonymous. You can access these types of sites by simply typing “anonymous” for the userID, without a password. Usually, the site administrator has files that can be copied but does not allow files to be posted with the anonymous userID.
If your class does not have an FTP server available, you can download and install a freeware version, such as Home FTP Server or Cerberus FTP server. The FTP Server on a computer running the CCNA Discovery Live CD may also be used. Another computer will act as the FTP client by using FTP from the command line, a web browser, or download a freeware version of an FTP client, such as SmartFTP Client or Core FTP LE client. Work in teams of two to complete this lab.

The following resources are required:
• Windows-based computer with an FTP client
• FTP server (Existing FTP server, downloaded freeware, or use Live CD)

Step 1: Examine FTP from the command prompt

1. Click the Start button, select Run, type cmd on the command line, and then click OK.
2. At the prompt, type ftp to start the FTP application. The prompt changes.
3. From the ftp prompt, type ? to see a list of the commands that can be used in this mode.
4. List three FTP commands. =====> append, ascii, bell
5. At the prompt, type help put to see a short description of the put command.
6. What is the purpose of the put command? to send one file
7. Use the help command again to get the purpose of the get, send, and recv commands.  

Get –> receive one file
Send –> send one file
recv –> receive one file
NOTE: The original FTP commands were PUT to send a file to an FTP server and GET to download a file from the FTP server. You also had to select ASCII or binary file mode. If you download a binary file in ASCII mode it could end up being corrupted. Some of the newer graphical programs now use send and receive in their place.
8. Partner with another student. Using procedures demonstrated in previous labs, write down the names and IP addresses of each partner computer. It is very important to get these names correct. Some FTP applications allow you to use either the IP address or the computer name.
Computer 1:
Computer 2:

Step 2: Use a GUI FTP client or web browser

1. If you are using a web browser as the FTP client, open the web browser and type ftp://ip_address_of_FTP_server. If the FTP server is configured to use an anonymous userID, connect directly to the FTP server. Using the FTP client, download an available file from the server.
2. If you are using a GUI FTP client, open the application. For most FTP clients, you must configure a new connection by giving it a name, the IP address of the FTP server, and a username and password. You may have to type anonymous if the FTP server allows this type of connection. Some applications have a checkbox that allows an anonymous login. When you have configured the connection, connect to the FTP server and download a file.
3. What is the name of the file you downloaded from the FTP server?
4. List one example of when FTP might be beneficial to a computer technician.

Step 3: (Optional) Use both an FTP server and client

1. If you control both the FTP server and client, practice sending files to and getting files from the client and the server.
2. Show your transferred files to another group of students.
3. Close the FTP server and client applications.

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Lab 6.2.1 Observing DNS Name Resolution

Lab 6.2.1 Observing DNS Name Resolution

Objectives

• Observe the conversion of a URL to an IP address.

• Observe DNS lookup using the nslookup command.

Background / Preparation

Domain Name System (DNS) is invoked when you type a Uniform Resource Locator (URL), such as http://www.cisco.com, into a web browser. The first part of the URL describes which protocol is being used. Common ones are HTTP (Hypertext Transfer Protocol), HTTPS (Hypertext Transfer Protocol over Secure Socket Layer), and FTP (File Transfer Protocol). DNS uses the second part of the URL, which in this example is www.cisco.com. DNS translates the domain name (like www.cisco.com) to an IP address in order to allow the source host to reach the destination host.

Work in pairs to complete this lab.

The following resources are required:

• Windows-based computer with Internet connectivity

• Access to the Run command

Step 1: Observe DNS conversion

1. Click the Start button, select Run, type cmd, and then click OK. The command prompt window appears.
2. b. At the command prompt, type ping www.cisco.com. The computer needs to translate www.cisco.com into an IP address so it knows where to send the Internet Control  Message Protocol (ICMP) packets. Ping is a type of ICMP packet.
3. The first line of the output shows www.cisco.com converted to an IP address by DNS. You should be able to see the effect of DNS even if your school has a firewall that prevents pinging, or if Cisco has prevented people from pinging their web server.

4. Which IP address is shown on the screen?

The answer:   68.254.168.178

5. Is it the same as the one shown in the figure? Why do you think this occurred?
6. Work together with another student and discuss one or two other instances (besides the ping command) in which the computer would use DNS.

Step 2: Verify DNS operation using the nslookup command

1. At the command prompt, type the nslookup command.
2. b. What is the default DNS server being used?

The answer :  the default DNS server being used is ns4.unp.ac.id

3. Notice how the command prompt changed. This is the NSLOOKUP prompt. From this prompt, you can enter commands related to DNS.
4. At the prompt, type ? to see a list of all the available commands that you can use in NSLOOKUP mode.
5. Write three commands that you can use with NSLOOKUP.

Root, exit, name, help,

6. At the NSLOOKUP prompt, type www.cisco.com.
7. What is the translated IP address?

The answer : the translated IP address is 60.254.176.170

8. Is it the same as the IP address shown with the ping command?

The answer : No, I don’t think so.

9. At the prompt, type the IP address of the Cisco web server that you just found. You can use NSLOOKUP to get the domain name of an IP address if you do not know the URL. Using the previous procedures, find an IP address associated with www.google.com.

The answer :

 There are some IP that associated with www.google.com sucah as 64.233.181.103, 64.233.181.147, 64.233.181.106, 64.233.181.99, 64.233.181.104 and 64.233.181.105

Step 3: Identify mail servers using the nslookup command

1. At the prompt, type set type=mx to have NSLOOKUP identify mail servers.
2. At the prompt, type www.cisco.com.
3. What is the primary name server, the responsible mail address, and the default Time to Live (TTL)?

The answer: No mail exchange (MX) records available for www.cisco.com

4. At the prompt, type exit to return to the regular command prompt.
5. At the prompt, type ipconfig /all.
6. Write the IP addresses of all the DNS servers that your school uses.

IP Address. . . . . . . . . . . . : 192.168.194.139

 Subnet Mask . . . . . . . . . . . : 255.255.255.192

 Default Gateway . . . . . . . . . : 192.168.194.129

 DHCP Server . . . . . . . . . . . : 192.168.194.129

 DNS Servers . . . . . . . . . . . : 192.168.194.129

                                                10.1.1.5

                                                202.134.0.155

7. Type exit to close the command prompt window.

Step 4: Reflection

1. If your school did not have a DNS server, what effect would this have on your use of the Internet?

2. Some companies do not dedicate a single server for DNS. Instead, the DNS server provides other functions as well. Which functions do you think might be included on a DNS server? Use the ipconfig /all command to help you with this.

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CCNA Discovery 1 Module 6 Exam Answers Version 4.0

CCNA Discovery 1 Module 6 Exam Answers Version 4.0

1. A user types www.cisco.com into a web browser address textbox. What does www.cisco.com represent?
• the IP address of a web server
• a physical network address
• the closest router interface to the source
• the source IP address in the data transmission

2. What type of server would use IMAP?
• DNS
• DHCP
• e-mail
• FTP
• Telnet
• web

3. Which type of server would most likely be used first by a network client in a corporate environment?
• DNS
• DHCP
• e-mail
• FTP
• Telnet
• web

4. Which protocol is used by FTP to transfer files over the Internet?
• TCP
• SMTP
• UDP
• SNMP

5. Which protocols are TCP/IP application layer protocols? (Choose two.)
• UDP
• FTP
• IP
• SMTP
• TCP

6. Which of the following are layers of the TCP/IP model? (Choose three.)
• Application
• Physical
• Internet
• Network Access
• Presentation

7. You are creating a network-based video game. What influences your decision about which transport protocol to use for the application?
• UDP will not disrupt the game to retransmit dropped packets.
• TCP provides extra acknowledgements that will ensure smooth video delivery.
• Both TCP and UDP can be used simultaneously to ensure speed and guaranteed delivery.
• Both TCP and UDP may slow transmission and disrupt game operation, so no transport protocol should be used.

8. Whenever e-mail clients send letters, what device is used to translate the domain names into their associated IP addresses?
• Uniform Resource Locator
• Network redirector server
• SNMP server
• DNS server

9. Which application is most likely used to translate www.cisco.com to 198.133.219.25?
• DHCP
• DNS
• FTP
• HTTP
• POP
• SMTP

10. Refer to the graphic. Which protocol is used to access this website?
• IM
• FTP
• HTTP
• SNMP
• VoIP

11. Which port number is used by SMTP?
• 20
• 21
• 25
• 26
• 110

12. Which protocol is used by e-mail servers to communicate with each other?
• FTP
• HTTP
• TFTP
• SMTP
• POP
• SNMP

13. What client software enables logged in users to communicate with other logged in users in real time?
• blog
• e-mail
• web mail
• instant messaging

14. An Internet server is running both FTP and HTTP services. How does the server know which of these applications should handle an incoming segment?
• The packet header identifies it as an HTTP or FTP packet.
• The data in the segment is specially formatted for either HTTP or FTP.
• The segment destination port number identifies the application that should handle it.
• The source port number is associated with one of these well known server applications.

15. What term is used to describe how TCP/IP protocols are layered and interact to format, address, and transmit information across a network?
• protocol hierarchy
• protocol modeling
• protocol stack
• protocol layering

16. What three items are contained in an Ethernet frame? (Choose three.)
• source IP address
• source MAC address
• destination IP address
• destination MAC address
• error-checking information

17. What information is contained in an IP header?
• source and destination IP addresses
• source and destination MAC addresses
• only destination IP and MAC addresses
• both source and destination IP and MAC addresses

18. Cabling issues are associated with which OSI layer?
• 4
• 2
• 1
• 3

19. A device receives an Ethernet frame and recognizes the MAC address as its own. What does the device do to the message to get to the encapsulated data?
• removes the IP header
• removes the TCP header
• passes data to the application layer
• removes the Ethernet header and trailer

20. A client has decoded a frame and started the de-encapsulation process. In which order does the de-encapsulation process occur?
• 1) remove IP header
2) remove Ethernet header and trailer
3) remove TCP header
4) pass data to the application
• 1) add TCP header to data
2) add an IP header
3) add frame header and trailer
4) encode the frame into bits
• 1) remove Ethernet header and trailer
2) remove IP header
3) remove TCP header
4) pass data to the application
• 1) add TCP header to data
2) add Ethernet header and trailer
3) add an IP header
4) encode the frame into bits

21. What is an advantage of the use of layers in the OSI reference model?
• It breaks network communications into larger parts.
• It increases complexity.
• It prevents changes in one layer from affecting other layers.
• It requires the use of single-vendor equipment for hardware and software communications.

22. What is the correct order of the layers of the OSI reference model, starting at the lowest layer and working up the model?
• data link, physical, transport, network, presentation, session, application
• physical, data link, network, session, transport, presentation, application
• physical, data link, network, transport, presentation, session, application
• physical, data link, network, transport, session, presentation, application
• application, session, presentation, transport, data link, network, physical

ANSWER:

  

1. a physical network address
 

2. e-mail
 

3. FTP
 

4. SMTP
 

5. FTP dan SMTP
 

6. Application, Network Access, Internet
 

7. Both TCP and UDP can be used simultaneously to ensure speed and guaranteed delivery
 

8. DNS server
 

9. DNS
 

10. bonus
 

11. 25
 

12. SMTP
 

13. e-mail
 

14. The packet header identifies it as an HTTP or FTP packet.
 

15. protocol layering 

16. source IP address, source MAC address, destination IP address
 

17. source and destination IP addresses
 

18. 4
 

19. passes data to the application layer
 

20. add TCP header to data, add Ethernet header and trailer, add an IP header, encode the frame into bits

21. It prevents changes in one layer from affecting other layers.
 

22.physical, data link, network, transport, session, presentation, application

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