Linux+ Linux+ Networking Services and Protocols 2

Question 1

Which protocol automatically assigns IP addresses, subnet masks, and default gateways to network clients?

Accepted Answer

DHCP

Answer

DNS

Answer

NTP

Answer

FTP

Question 2

Which file contains static hostname-to-IP address mappings that are checked before DNS?

Accepted Answer

/etc/hosts

Answer

/etc/resolv.conf

Answer

/etc/hostname

Answer

/etc/network/interfaces

Question 3

What is the primary purpose of NTP (Network Time Protocol) in a Linux environment?

Accepted Answer

Synchronize system clocks across the network

Answer

Translate domain names to IP addresses

Answer

Assign dynamic IP addresses to hosts

Answer

Route packets between different network segments

Question 4

Which modern command replaces netstat and displays active network connections and listening ports?

Accepted Answer

ss

Answer

ifconfig

Answer

ip addr

Answer

nmcli

Question 5

Which service is a modern NTP implementation that synchronizes the Linux system clock with remote time servers?

Accepted Answer

chronyd

Answer

ntpd

Answer

timesync

Answer

hwclock

Question 6

Which command is the 'Swiss Army knife' of networking, capable of testing TCP/UDP port connectivity?

Accepted Answer

nc

Answer

ping

Answer

traceroute

Answer

route

Question 7

What does the command `ssh-keygen -t ed25519` do?

Accepted Answer

Generates an Ed25519 SSH key pair

Answer

Tests SSH connectivity to a remote server

Answer

Converts an existing RSA key to Ed25519 format

Answer

Verifies the integrity of an existing SSH key