FREE Linux+ Network Interface Configuration Questions and Answers

Question 1

A system administrator needs to assign a temporary IP address 192.168.10.50/24 to the `eth1` interface, which is currently down.
Which sequence of commands will accomplish this and make the interface active?

Accepted Answer

sudo ip addr add 192.168.10.50/24 dev eth1; sudo ip link set eth1 up

Answer

sudo ifconfig eth1 192.168.10.50 netmask 255.255.255.0; sudo ifup eth1

Answer

sudo nmcli con add ifname eth1 type ethernet ip4 192.168.10.50/24

Answer

sudo ip route add 192.168.10.50/24 dev eth1; sudo ip link set eth1 on

Question 2

On a modern Ubuntu server, a junior administrator needs to configure a static IP address that persists after a reboot. In which directory should they create or edit a YAML configuration file to accomplish this using the default network management tool?

Accepted Answer

/etc/netplan/

Answer

/etc/sysconfig/network-scripts/

Answer

/etc/network/

Answer

/etc/NetworkManager/system-connections/

Question 3

A network administrator is working on a server managed by NetworkManager and wants to view all available network device statuses and their connections using the command-line. Which of the following commands provides the most comprehensive overview for this purpose?

Accepted Answer

nmcli device status

Answer

ip addr show

Answer

ifconfig -a

Answer

netstat -i

Question 4

An administrator observes that the output of `ip a` shows an interface named `enp3s0` in the `DOWN` state. Which command should be used to activate this interface?

Accepted Answer

ip link set enp3s0 up

Answer

ifup enp3s0

Answer

nmcli device connect enp3s0

Answer

ip addr add dev enp3s0

Question 5

When examining the output of the `ip addr show` command, what does the `scope global` attribute signify for an IPv4 address?

Accepted Answer

The address is routable and valid for communication beyond the local network.

Answer

The address is only valid for communication on the local link (subnet).

Answer

The address is valid for communication only within the local host.

Answer

The address is a broadcast address for the local network.

Question 6

A system administrator has just made changes to a NetworkManager connection profile file located in `/etc/NetworkManager/system-connections/`. The changes are not taking effect immediately. Which `nmcli` command should be run to apply the new configuration without restarting the entire networking service?

Accepted Answer

nmcli connection reload

Answer

nmcli networking off && nmcli networking on

Answer

nmcli device reapply

Answer

nmcli general reload

A system administrator needs to assign a temporary IP address 192.168.10.50/24 to the `eth1` interface, which is currently down.Which sequence of commands will accomplish this and make the interface active?

A system administrator needs to assign a temporary IP address 192.168.10.50/24 to the `eth1` interface, which is currently down.
Which sequence of commands will accomplish this and make the interface active?