CCNA Certification Prep: Router Boot Processes and Command Histories

1. During startup, router CK1 displays the following error message: boot: cannot open 'flash:'. What will CK1 do next?

A. It will automatically reformat the flash memory and try to boot again.

B. It will shut down permanently and require manual intervention to proceed.

C. It will skip the IOS boot process and proceed directly to the configuration loading phase.

When encountering an error where 'flash:' cannot be opened during startup, the typical next step for the router would be to try and locate the IOS from a TFTP server. If this attempt fails, it will resort to loading a limited IOS from ROM. The other provided incorrect answers do not align with the standard behavior in this scenario.

Explanation

When encountering an error where 'flash:' cannot be opened during startup, the typical next step for the router would be to try and locate the IOS from a TFTP server. If this attempt fails, it will resort to loading a limited IOS from ROM. The other provided incorrect answers do not align with the standard behavior in this scenario.

2. After logging into a router and typing in a few show commands, you press the up arrow key. What will this do?

C. It will log you out of the router.

A. It will recall the previous command line

B. It will delete the previous command line.

D. It will execute the next command in the command history.

When you press the up arrow key after typing in show commands, it will recall the previous command line that you entered. This is a useful feature for quickly accessing and reusing previous commands without retyping them.

Explanation

When you press the up arrow key after typing in show commands, it will recall the previous command line that you entered. This is a useful feature for quickly accessing and reusing previous commands without retyping them.

3. After working on a router, some problems arise and you wish to view the commands that you recently entered. Which IOS command opens the history buffer and displays the most recently entered commands?

A. Show history

D. History buffer

B. Display commands

C. View log

The correct IOS command to open the history buffer and display the most recently entered commands is 'Show history'. The other options provided do not specifically pertain to viewing recent commands entered on a router.

Explanation

The correct IOS command to open the history buffer and display the most recently entered commands is 'Show history'. The other options provided do not specifically pertain to viewing recent commands entered on a router.

4. You have just purchased a brand new router and wish to have the router prompt you through the initial configuration commands. Which router mode does this describe?

C. Debugging mode

D. Bridge mode

A. Maintenance mode

B. SETUP mode

When setting up a brand new router and going through the initial configuration commands, it is typically done in SETUP mode to guide you through the process.

Explanation

When setting up a brand new router and going through the initial configuration commands, it is typically done in SETUP mode to guide you through the process.

5. There are no boot system commands in the router configuration in NVRAM for router CK1. What is the fallback sequence that the router CK1 will use to find an IOS during reload?

B. Flash, TFTP server, ROM

A. Flash, NVRAM, ROM

D. NVRAM, ROM, Flash

C. ROM, Flash, TFTP server

During reload, if there are no boot system commands in the router configuration in NVRAM for router CK1, the router will fall back on looking for the IOS in the order of Flash first, then the TFTP server if not found in Flash, and finally the ROM as a last resort.

Explanation

During reload, if there are no boot system commands in the router configuration in NVRAM for router CK1, the router will fall back on looking for the IOS in the order of Flash first, then the TFTP server if not found in Flash, and finally the ROM as a last resort.