010-160 010-160 - LPI Linux Essentials Networking Basics Questions and Answers 3

Question 1

Which command is used to query DNS and look up the IP address of a domain name?

Accepted Answer

All of the above

Answer

host

Answer

dig

Answer

nslookup

Question 2

What class of IPv4 address range is reserved for private networks and not routable on the public internet (e.g., 192.168.x.x)?

Accepted Answer

Private (RFC 1918)

Answer

Public

Answer

Multicast

Answer

Loopback

Question 3

Which protocol does the `ping` command use to test network connectivity?

Accepted Answer

ICMP

Answer

TCP

Answer

UDP

Answer

ARP

Question 4

What does the `wget` command do in Linux?

Accepted Answer

Downloads files from the internet using HTTP, HTTPS, or FTP

Answer

Searches the web from the terminal

Answer

Configures network interfaces

Answer

Monitors network traffic

Question 5

Which file controls the order in which name resolution methods (files, DNS) are tried on a Linux system?

Accepted Answer

/etc/nsswitch.conf

Answer

/etc/resolv.conf

Answer

/etc/hosts

Answer

/etc/dns.order

Question 6

What is the default subnet mask for a Class C IP network (e.g., 192.168.1.0)?

Accepted Answer

255.255.255.0

Answer

255.255.0.0

Answer

255.0.0.0

Answer

255.255.255.255