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

DHCP (Dynamic Host Configuration Protocol) dynamically leases IP configuration parameters to network clients.

Question 2

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

Accepted Answer

/etc/hosts

Answer

/etc/hosts contains static hostname-to-IP mappings; by default nsswitch.conf checks this file before querying DNS.

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

NTP synchronizes the system clock to a reliable time source, ensuring accurate and consistent timestamps across all systems.

Question 4

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

Accepted Answer

ss

Answer

ss (socket statistics) is the modern replacement for netstat and displays TCP/UDP connections, listening sockets, and socket states.

Question 5

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

Accepted Answer

chronyd

Answer

chronyd is a modern, more accurate NTP implementation that adjusts and maintains system clock synchronization with remote NTP servers.

Linux Practice Test