Linux Networking 5

Question 1

Which command brings a network interface down without removing its configuration?

Accepted Answer

ip link set eth0 down

Answer

`ip link set <interface> down` disables the interface at the link layer while preserving its address configuration.

Question 2

What does the `/proc/net/if_inet6` file contain?

Accepted Answer

IPv6 addresses assigned to network interfaces

Answer

`/proc/net/if_inet6` lists all IPv6 addresses currently assigned to network interfaces along with their prefix lengths and flags.

Question 3

Which `nftables` command lists all current rulesets?

Accepted Answer

nft list ruleset

Answer

`nft list ruleset` displays the complete nftables configuration including all tables, chains, and rules.

Question 4

What is a network namespace in Linux used for?

Accepted Answer

Isolating network stack instances for containers or processes

Answer

Linux network namespaces create isolated copies of the entire network stack, enabling containers to have their own interfaces, routes, and firewall rules.

Question 5

Which command would display the MAC address of the `eth0` interface?

Accepted Answer

ip link show eth0

Answer

`ip link show <interface>` displays link-layer information including the hardware (MAC) address of the interface.

Linux Practice Test

Linux Practice Test

Linux Networking 5