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CCNA Practice Questions: Basic IOS Configuration and Basic Serial WAN Connectivity

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Jeremy Cioara and Chris Ward provide 50 questions with detailed answers from the CCNA exam's "Basic IOS Configuration and Basic Serial WAN Connectivity" objective.
This chapter is from the book

This chapter is from the book

  1. In which of the following modes in Cisco's IOS can you issue show commands?

    1. User

    2. Privileged

    3. Line Configuration

    4. Global Configuration

  2. You are the network administrator for a large corporation. You want to be able to store all your configurations in a centralized location. Which of these servers will allow you to do so? (Choose all that apply.)

    1. FTP

    2. TFTP

    3. SQL

    4. Oracle

  3. You need to troubleshoot your network IP connectivity. Which of the following commands would you use to find the IP address on your Ethernet 0 interface?

    1. ping

    2. IPConfig

    3. traceroute

    4. Show interface Ethernet 0

  4. Which command would you use in the CLI at User mode to enter Privileged EXEC mode?

    1. Privilege

    2. Admin

    3. Enable

    4. Disable

  5. You have just received 14 Catalyst 3550 switches for your network. What is required to get them functioning correctly in your network?

    1. Nothing

    2. Set up an IP address on the switch

    3. Interconnect them to routers

    4. Install the Cisco IOS

  6. Which of the following prompts indicates your router is in Privileged EXEC mode?

    1. Router>

    2. Router#

    3. Router&

    4. Router$

  7. You have made a console connection to your Cisco Catalyst 1900 series switch and you see the > symbol in HyperTerminal. What does it mean?

    1. You are in Privileged EXEC mode.

    2. You are in User EXEC mode.

    3. The switch has not been configured.

    4. The switch is in need of repairs.

  8. You would like to assign a meaningful name to your Catalyst 1900 series switch—what command should you use?

    1. enable

    2. host name

    3. hostname

    4. name

  9. You need to assign an IP address to your Catalyst 1912 switch. You are at the HQ_SW1> prompt. What is the correct series of commands? (cr = carriage return)

    1. enable <cr> ip address 10.1.1.1

    2. enable <cr> ip address 10.1.1.1 255.0.0.0

    3. enable <cr> configure terminal <cr> ip address 10.1.1.1

    4. enable <cr> configure terminal <cr> ip address 10.1.1.1 255.0.0.0

  10. Which of the following commands displays the syntax for the clock command?

    1. cl?

    2. clock?

    3. clock ?

    4. cl ?

  11. Which of the following commands will place a welcoming message whenever you log in to a router?

    1. Router(config)# banner message

    2. Router(config)# banner motd &

    3. Router# banner motd #

    4. Router# banner message !

  12. You need to connect to your 2611 router to configure an interface. Which of the following methods will allow you to issue commands on the router? (Choose all that apply.)

    1. Telnet

    2. FTP

    3. Console connection

    4. AUX connection

  13. You want to prevent unauthorized users from plugging their laptops into the router. What type of password will help prevent this issue?

    1. vty

    2. Interface

    3. Console

    4. Enable

  14. You have connected to the console port and are running HyperTerminal. All you see is gobbledygook numbers—what is the solution to this problem?

    1. Change the connectors

    2. Use a different Terminal program

    3. Reset the router

    4. Adjust the baud rate

    Figure 3.1Figure 3.1

  15. Which of the following commands would you type to receive this output?

    1. Show running-config

    2. Show startup-config

    3. Show ip route

    4. Show version

  16. You are configuring a router named East for authentication with a router named West using CHAP. What username should you configure on East to allow the routers to communicate?

    1. East

    2. West

    3. South

    4. North

  17. What is the default point-to-point encapsulation protocol used on a Cisco router?

    1. PPP

    2. SLIP

    3. HDLC

    4. ATM

  18. What type of handshake occurs with CHAP authentication?

    1. One-way

    2. Two-way

    3. Three-way

    4. Mutual

  19. The establishment of a PPP serial connection occurs in three steps. Where would authentication fit in to those three steps?

    1. Step 1

    2. Step 2

    3. Step 3

    4. None—authentication occurs after the link is fully established

    Figure 3.2Figure 3.2

  20. Which of the following commands did you type to see this output on your Cisco router?

    1. Show version

    2. Show running-config

    3. Show startup-config

    4. Show router setup

    Figure 3.3Figure 3.3

  21. Which of the following commands did you type to see this output?

    1. Show interface Ethernet 0/0

    2. Show ip interface detail

    3. Show interface Serial 0/1

    4. Show ip interface brief

    Figure 3.4Figure 3.4

     

    Figure 3.5Figure 3.5

  22. Your routers at ACME are having some connectivity issues. You issue show commands for each connecting router's interface. Why are they unable to communicate?

    1. Incorrect IP address

    2. Wrong routing protocol

    3. Bad cable

    4. Encapsulation mismatch

  23. You need to back up the configurations you just made but there are no TFTP servers available. Which of the following commands are options to backup your currently running configuration? (Choose all that apply.)

    1. Router1#copy running-config startup-config

    2. Router1#copy running-config flash

    3. Router1#copy startup-config running-config

    4. Router1#copy running-config rcp

  24. You are consulting a small business that is establishing its first WAN link. The client wants to know what encapsulation you will be using on the link. Which of the following are valid encapsulations for WAN links? (Choose all that apply.)

    1. Frame relay

    2. Ethernet

    3. Token ring

    4. PPP

    5. q E. HDLC

  25. Your boss is concerned about security on your network. She wants to make sure that no one can identify passwords if they happen to view a configuration on your router. What command will encrypt all passwords on your router?

    1. Router1#service password-encryption

    2. Router1(config)#service password-encryption

    3. Router1#enable secret password

    4. Router1(config)#enable secret password

  26. You need to set up a password that will prevent unauthorized users from telnetting into your router. What series of commands would you use?

    1. Acme1(config)# line console 0
      Acme1(config-line)# password acme
      Acme1(config-line)# login

    2. Acme1(config)# line vty 0
      Acme1(config-line)# enable password acme

    3. Acme1(config)# line vty 0
      Acme1(config-line)# enable secret acme
      Acme1(config-line)# login

    4. Acme1(config)# line vty 0
      Acme1(config-line)# password acme
      Acme1(config-line)# login

  27. When setting up your serial interfaces, what does the clockrate command do for your connection?

    1. Establishes the timing at which you send data

    2. Establishes keepalives

    3. Establishes the advertised bandwidth

    4. Establishes the time on the router

  28. You need to set up passwords on all your default Telnet lines. What command would you start with?

    1. Router1(config)#telnet configuration

    2. Router1(config)#interface Ethernet 0/1

    3. Router1(config)#line vty 1 5

    4. Router1(config)#line vty 0 4

  29. You can execute show commands at which prompt? (Choose all that apply.)

    1. Router1#

    2. Router1(config)#

    3. Router1(config-router)#

    4. Router1>

    5. romon1>

  30. You are configuring your router and type in an Enable password and an Enable Secret password. Your fellow network technician asks you why you have two passwords set when you only need one. What do you tell him?

    1. The Enable password is used by low-level applications.

    2. If you reverted to an older version of the IOS, it would not understand the Secret password.

    3. Both passwords are treated the same.

    4. It is a failsafe method of ensuring that people need to type two passwords instead of just one.

  31. You need to get back to Privileged mode from Interface Configuration mode. What is the quickest method?

    1. Ctrl+Shift+6, then press X

    2. Ctrl+Esc

    3. Ctrl+Z

    4. Type exit

  32. When establishing a PPP link, which of the following would be negotiated? (Choose all that apply.)

    1. IPXCP

    2. CHAP

    3. UDP

    4. Q.931

    5. Multilink Protocol

  33. Which of the following commands will return your router to a previously saved configuration?

    1. Router1#setup

    2. Router1#copy running-config startup-config

    3. Router1#copy startup-config running-config

    4. Router1#reload

  34. Cisco's Internetwork Operating System (IOS) provides many services. Which of the following are features of the IOS? (Choose all that apply.)

    1. Connectivity for high-speed traffic between devices

    2. Security to control access and prohibit unauthorized network use

    3. Features to carry network protocols

    4. Web-based GUI to configure features

  35. What is the baud rate setting for your terminal emulation program so that you can communicate through your console port?

    1. 2400

    2. 9600

    3. 14400

    4. 36300

  36. What must be configured on a Cisco device to enable Telnet functionality?

    1. A management IP address

    2. SNMP

    3. CDP

    4. vty ports

  37. You are configuring your Cisco router and need to go back to User EXEC mode. What command will take you back to User EXEC mode?

    1. Router1#enable

    2. Router1#exit

    3. Router1#configure terminal

    4. Router1#disable

  38. Which of the following commands will place an IP address on your Catalyst 1900 switch?

    1. Switch1#ip address 10.1.1.1

    2. Switch1#ip address 10.1.1.1 255.255.255.0

    3. Switch1(config)#ip address 10.1.1.1 255.255.255.0

    4. Switch1(config-vlan)#ip address 10.1.1.1 255.255.255.0

    Figure 3.6Figure 3.6

  39. Which of the following commands did you enter to receive this output?

    1. Router1#show NVRAM

    2. Router1#show Flash

    3. Router1#show Flash-Mem

    4. Router1#show Version

  40. Your senior network administrator is unable to telnet to the Catalyst 1900 switch because she forgot the IP address. You have physical access and are able to console in. Which of the following commands is the best to get the IP address on the switch?

    1. Switch1#show ip

    2. Switch1#show vlan 1

    3. Switch1#show ip route

    4. Switch1#show version

    Figure 3.7Figure 3.7

  41. You have powered up your Cisco 3640 router. The first thing you see is the above output. Which of the following statements about this screen is accurate?

    1. Your IOS is corrupt and unable to load.

    2. Your configuration is missing parameters.

    3. You do not have a configuration saved in NVRAM.

    4. You have typed setup in the Privileged mode.

  42. You type in a command and are shown the following output:

  43. % Ambiguous command: "show con"

    What does this mean?

    1. You did not enter enough characters for your device to recognize the command.

    2. You did not enter all the keywords or values required by this command.

    3. You entered the command incorrectly.

    4. Context-sensitive help is unable to help you with this command.

  44. You are typing a command into the Cisco IOS. It is more than one terminal line long. What will the IOS do?

    1. The router automatically moves the cursor to the next line and uses a caret (^) to indicate the line break.

    2. The router truncates the command because commands longer than one line are not allowed.

    3. The router automatically scrolls the line to the left and uses a dollar sign ($) to indicate that there is text to the left of the $.

    4. The router shortens all the commands to squeeze the command on to the screen.

  45. You want to change the size of the command history buffer. Which of the following commands will set it permanently to 100?

    1. Router1#terminal history 100

    2. Router1#history size 100

    3. Router1(config)#terminal history 100

    4. Router1(config-line)#history size 100

  46. You have configured a description on your serial interfaces. Which of the following commands will display the description? (Choose two.)

    1. Show running-config

    2. Show flash

    3. Show interfaces

    4. Show ip protocols

  47. You are typing commands into your Cisco IOS on your 3640 router. However, your typing is consistently interrupted by console messages, forcing you to retype. Which of the following commands will force the IOS to retype your original input after it displays the console message?

    1. Exec-timeout

    2. Logging synchronous

    3. Line console

    4. Exec message readout

  48. You are configuring a router and issue the command interface ethernet 1/0/0. What do the numbers represent?

    1. Slot/port/interface

    2. Slot/interface/port

    3. Port/slot/port number

    4. Slot/port adapter/port number

  49. Which of the following commands correctly sets the physical speed of a serial interface to 64Kbps?

    1. Router1(config-if)#bandwidth 64

    2. Router1(config-if)#bandwidth 64000

    3. Router1(config-if)#clockrate 64

    4. Router1(config-if)#clockrate 64000

  50. In what mode do you use the encapsulation command?

    1. Interface Configuration mode

    2. Sub-Interface Configuration mode

    3. User mode

    4. Privileged mode

    Figure 3.8Figure 3.8

  51. You are configuring your router and your boss happens to look over your shoulder as you type a show running-config command. She asks what the highlighted numbers and characters mean. What do you tell her?

    1. It is the actual password.

    2. It is the result of a service password-encryption command.

    3. The console output made a mistake.

    4. It is the result of an enable secret command.

Quick Check Answer Key

  1. A, B

  2. A, B

  3. D

  4. C

  5. A

  6. B

  7. B

  8. C

  9. D

  10. C

  11. B

  12. A, C, D

  13. C

  14. D

  15. A

  16. B

  17. C

  18. C

  19. B

  20. A

  21. D

  22. D

  23. A, B, D

  24. A, D, E

  25. B

  26. D

  27. A

  28. D

  29. A, D

  30. B

  31. C

  32. A, B, E

  33. D

  34. A, B, C

  35. B

  36. A

  37. D

  38. C

  39. B

  40. A

  41. C

  42. A

  43. C

  44. D

  45. A, C

  46. B

  47. D

  48. D

  49. A

  50. B

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