XK0-005 · Question #853
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 correct answer is A. ip link set enp0s3 up. 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.
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
How the community answered
(24 responses)- A92% (22)
- C4% (1)
- D4% (1)
Why each option
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.
The `ip link set` command is used to modify the state or properties of a network interface. Specifically, `ip link set enp0s3 up` will activate the `enp0s3` interface, changing its status from `DOWN` to `UP` and allowing it to transmit and receive network traffic.
`ifb` refers to an Intermediate Functional Block device, a virtual interface for traffic shaping, and is not used to bring a physical interface up.
`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.
`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)
Source: https://man7.org/linux/man-pages/man8/ip-link.8.html
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