CCNA 2 MODULE 5 Flashcards
What is the first step in the router boot sequence?
Locating the Cisco IOS Software
This involves checking different sources like flash memory, TFTP, or ROM.
What are the possible sources to boot IOS?
- Flash Memory
- TFTP Server
- ROM
Each source is used depending on the availability and condition of other sources.
What is the advantage of booting IOS from Flash Memory?
Information stored in flash memory is not vulnerable to network failures.
What happens if flash memory is corrupted?
A system image can be loaded from a TFTP server.
What is the final bootstrap option if both flash memory and TFTP server fail?
Booting from ROM.
What is the configuration register?
A 16-bit register in NVRAM that determines the boot sequence.
How is the configuration register value expressed?
As a hexadecimal number.
What does the configuration register value 0x2102 indicate?
It tells the router to load the IOS from flash memory.
What command is used to display the router’s version?
show version
What should you check if the router does not boot properly?
- Missing or incorrect boot system statement
- Incorrect configuration register value
- Corrupted flash image
- Hardware failure
These are common issues that can prevent proper booting.
What command can be used to find a boot system statement?
show running-config
What is one sign of a corrupted flash image?
Error messages during boot such as ‘cannot open flash:’
What should be done if the router has a hardware failure?
Contact the Cisco Technical Assistance (TAC) center.
What is the Cisco IOS File System (IFS)?
A single interface for managing all file systems used by a router.
What does the IFS allow you to manage?
- Flash memory
- Network file systems (TFTP, rcp, FTP)
- NVRAM
- Running configuration
- ROM
This unifies file system management for easier use.
What is the URL convention used for in IFS?
To specify the location of configuration files on network devices.
What is one method to back up configuration files?
Capturing the output of the show running-config command.
What are the environment variables used for in TFTP?
To provide a minimal configuration for TFTP of the IOS.
What command is used to set environment variables for TFTP?
set
Fill in the blank: The command to reset the router after TFTP download is _______.
reset
What is the command to save environment variables in NVRAM?
sync
What is the first step in password recovery for a router?
Cold Boot router
Which command is used to copy the startup configuration to the running configuration?
Copy start run
True or False: The configuration register value 0x2142 is used during password recovery.
True
