1. Which statement is true about the running configuration file in a Cisco IOS device?

As soon as configuration commands are entered into a router, they modify the device immediately. Running configuration files can not be deleted nor are they saved automatically.

2. Which two statements are true regarding the user EXEC mode? (Choose two.)

User EXEC mode limits access to some show and debug commands. It is the first level of user interface encountered when configuring a router and is intended for investigation of certain functions of the device. The User EXEC prompt is identified with the ">" symbol.

3. Which type of access is secured on a Cisco router or switch with the enable secret command?

The enable secret command secures access to the privileged EXEC mode of a Cisco router or switch.

4. What is the default SVI on a Cisco switch?

Layer 2 switches use switch virtual interfaces (SVIs) to provide a means for remote access over IP. The default SVI on a Cisco switch is VLAN1.

5. When a hostname is configured through the Cisco CLI, which three naming conventions are part of the guidelines? (Choose three.)

A hostname can be configured with upper or lower case characters and should end with a letter or digit, not a special character. A hostname should start with a letter and no space is allowed for a hostname.

6. What is the function of the shell in an OS?

Most operating systems contain a shell and a kernel. The kernel interacts with the hardware and the shell interfaces between the kernel and the users.

7. A router with a valid operating system contains a configuration file stored in NVRAM. The configuration file has an enable secret password but no console password. When the router boots up, which mode will display?

If a Cisco IOS device has a valid IOS and a valid configuration file, it will boot into user EXEC mode. A password will be required to enter privileged EXEC mode.

8. An administrator has just changed the IP address of an interface on an IOS device. What else must be done in order to apply those changes to the device?

Changes to router and switch configurations take effect as soon as the command is entered. For this reason, it is very important that changes to live production devices are always carefully planned before being implemented. If commands are entered that render the device unstable or inaccessible, the device may have to be reloaded, resulting in network downtime.

9. Which memory location on a Cisco router or switch will lose all content when the device is restarted?

RAM is volatile memory and will lose all contents if the router or switch is restarted or shutdown.

10. Why would a technician enter the command copy startup-config running-config?

Usually, changes are made to a running configuration in RAM and copied to NVRAM. However, in this case, the technician wants to copy a previously saved configuration from NVRAM into RAM in order to make changes to it.

11. Which functionality is provided by DHCP?

DHCP provides dynamic and automatic IP address assignment to hosts.

12. Which two functions are provided to users by the context-sensitive help feature of the Cisco IOS CLI? (Choose two.)

Context-sensitive help provides the user with a list of commands and the arguments associated with those commands within the current mode of a networking device. A syntax checker provides error checks on submitted commands and the TAB key can be used for command completion if a partial command is entered.

13. Which memory location on a Cisco router or switch stores the startup configuration file?

The startup configuration file of a Cisco router or switch is stored in NVRAM, which is nonvolatile memory.

14. To what subnet does the IP address belong if a subnet mask of is used?

The purpose of a subnet mask is to separate the network portion of the address from the host portion of the IP address. The network portion of the IP address is identified by all binary 1s in the subnet mask. Using a subnet mask of identifies the first two octets of the IP address as the network portion.

15. Which access method would be most appropriate if you were in the equipment room with a new switch that needs to be configured?

16. Which access method would be most appropriate if your manager gave you a special cable and told you to use it to configure the switch?

17. Which access method would be the most appropriate in-band access to the IOS over a network connection?

18. Which access method would be the most appropriate if you call your manager to tell him you cannot access your router in another city over the internet and he provides you with the information to access the router through a telephone connection?

19. Which IOS mode allows access to all commands and features?

20. Which IOS mode are you in if the Switch(config)# prompt is displayed?

21. Which IOS mode are you in if the Switch> prompt is displayed?

22. Which two commands would return you to the privileged EXEC prompt regardless of the configuration mode you are in? (Choose two.)

23. What is the command to assign the name “Sw-Floor-2” to a switch?

24. How is the privileged EXEC mode access secured on a switch?

25. Which command enables password authentication for user EXEC mode access on a switch?

26. Which command encrypts all plaintext passwords access on a switch?

27. Which is the command to configure a banner to be displayed when connecting to a switch?

28. What is the structure of an IPv4 address called?

29. How is an IPv4 address represented?

30. What type of interface has no physical port associated with it?