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What is the primary method for recovering or upgrading a Cisco network device system image?

A.

USB storage

Answers
A.

USB storage

B.

FTP

Answers
B.

FTP

C.

the tftpdnld command

Answers
C.

the tftpdnld command

D.

the xmodem command

Answers
D.

the xmodem command

Suggested answer: C

Explanation:

The tftpdnld command in Cisco IOS is specifically designed for recovering or upgrading a system image. Here's how it's the most effective method:

Purpose: The tftpdnld command directly initiates a TFTP download of a new system image and stores it in memory. This is ideal for replacing a corrupt image or upgrading to a newer version of Cisco IOS.

ROMmon: The tftpdnld command can often be used from ROMmon mode, which is essential when the existing image is unusable.

Efficiency: It streamlines the image transfer process specifically using TFTP, which is commonly used for Cisco IOS images.

Why other options are less ideal:

USB storage: While some newer Cisco devices may allow direct loading of an IOS image from USB, this isn't universally supported and often requires specific boot commands.

FTP: FTP (File Transfer Protocol) can be used for file transfers, but it's not as commonly used as TFTP in the context of Cisco IOS image recovery. The tftpdnld command offers a more tailored solution for this purpose.

the xmodem command: XMODEM is a legacy file transfer protocol that is slower and less reliable than TFTP, especially for larger files like Cisco IOS images.

asked 07/10/2024
Peter Avino
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