XK0-005 Question #853: Real Exam Question with Answer & Explanation

Question

A systems administrator receives the following message after running an ip link command to verify the status of a network interface named enp0s3: state DOWN Which of the following commands should the administrator use to resolve this issue?

Options

• Aip link set enp0s3 up
• Bip link ifb enp0s3 up
• Cip link add enp0s3 up
• Dip link enp0s3 up

Explanation

To resolve a network interface in a state DOWN status, the ip link set command followed by the interface name and the up argument is used to activate it.

Common mistakes.

• B. ifb refers to an Intermediate Functional Block device, a virtual interface for traffic shaping, and is not used to bring a physical interface up.
• C. ip link add is used to create new virtual network interfaces (e.g., bridges, bonds), not to change the state of an existing physical interface.
• D. ip link enp0s3 up is syntactically incomplete; the set subcommand is required with ip link to modify an existing link's state.

Concept tested. Linux network interface management (ip command)

Reference. https://man7.org/linux/man-pages/man8/ip-link.8.html

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