010-160 010-160 - LPI Linux Essentials Networking Basics Questions and Answers 2

Question 1

Which command shows the routing table on a Linux system using the modern iproute2 suite?

Accepted Answer

ip route

Answer

The `ip route` command displays the kernel routing table, showing how packets are directed to their destinations on modern Linux systems.

Question 2

What port number is used by the SSH (Secure Shell) protocol by default?

Accepted Answer

22

Answer

SSH uses TCP port 22 by default to provide encrypted remote login and command execution over a network.

Question 3

Which command traces the network path (hops) that packets take to reach a destination host?

Accepted Answer

traceroute

Answer

The `traceroute` command sends packets with increasing TTL values to discover each router (hop) along the path to a destination host.

Question 4

What does the command `ss -tuln` display on a Linux system?

Accepted Answer

Listening TCP and UDP ports without resolving names

Answer

The `ss -tuln` command lists all listening TCP (-t) and UDP (-u) sockets with numeric addresses (-n) without resolving hostnames (-l for listening).

Question 5

Which command on Linux is used to securely copy files between a local machine and a remote host over SSH?

Accepted Answer

scp

Answer

The `scp` (secure copy) command uses the SSH protocol to encrypt and transfer files between local and remote systems.

(010-160) LPI Linux Essentials Practice Test