ICND1 Infrastructure Maintenance 3 — Questions and Answers
Question 1: Which file system location stores the Cisco IOS image on most routers?
- NVRAM
- RAM
- Flash (Correct answer)
- ROM
Correct answer: Flash
The IOS image is stored in Flash memory, which is non-volatile and retains content after power loss.
Question 2: A network admin wants to upgrade IOS using TFTP. Which command copies the IOS image from a TFTP server to flash?
- copy tftp flash (Correct answer)
- copy flash tftp
- transfer tftp flash
- upload tftp flash
Correct answer: copy tftp flash
The 'copy tftp flash' command downloads an IOS image from a TFTP server and stores it in flash memory.
Question 3: What is the function of the configuration register value 0x2142 on a Cisco router?
- Boots normally from flash
- Bypasses the startup configuration in NVRAM (Correct answer)
- Enables ROM Monitor mode
- Forces a full factory reset
Correct answer: Bypasses the startup configuration in NVRAM
Config register 0x2142 tells the router to ignore the startup-config, which is used for password recovery procedures.
Question 4: During password recovery on a Cisco router, what key sequence is used to interrupt the boot process and enter ROM Monitor (ROMmon) mode?
- Ctrl+Z
- Ctrl+C
- Break key (Ctrl+Break) (Correct answer)
- Ctrl+Shift+6
Correct answer: Break key (Ctrl+Break)
Sending a Break signal (typically Ctrl+Break) within the first 60 seconds of boot interrupts the process and enters ROMmon mode.
Question 5: Which command shows the contents of a router's flash memory?
- show nvram
- show flash:
- dir flash: (Correct answer)
- show memory flash
Correct answer: dir flash:
The 'dir flash:' command lists the files and directories stored in flash memory.
Question 6: What happens if a Cisco router boots and cannot find a valid IOS image in flash?
- It boots from NVRAM automatically
- It enters ROM Monitor (ROMmon) mode (Correct answer)
- It uses a minimal IOS from RAM
- It powers off automatically
Correct answer: It enters ROM Monitor (ROMmon) mode
If no valid IOS image is found in flash, the router falls back to ROMmon mode for recovery.
Question 7: A Cisco switch needs to be configured with a management IP address. On which interface is this typically configured?
- FastEthernet0/0
- GigabitEthernet0/1
- Vlan1 (SVI) (Correct answer)
- Console 0
Correct answer: Vlan1 (SVI)
A Layer 2 switch uses a Switched Virtual Interface (SVI), typically VLAN 1, to assign a management IP address.
ICND1 Infrastructure Maintenance 3
Which file system location stores the Cisco IOS image on most routers?