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

The `host`, `dig`, and `nslookup` commands can all be used to perform DNS lookups and retrieve IP addresses or other DNS records for domain names.

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

RFC 1918 defines private IP ranges (10.x.x.x, 172.16-31.x.x, 192.168.x.x) that are reserved for internal networks and not routed on the public internet.

Question 3

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

Accepted Answer

ICMP

Answer

The `ping` command uses ICMP (Internet Control Message Protocol) echo request and echo reply messages to test if a host is reachable.

Question 4

What does the `wget` command do in Linux?

Accepted Answer

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

Answer

The `wget` command is a non-interactive downloader that retrieves files from web servers using HTTP, HTTPS, or FTP protocols.

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

The `/etc/nsswitch.conf` file specifies the order of name service databases consulted for hostname resolution, typically listing 'files' (hosts) before 'dns'.

(010-160) LPI Linux Essentials Practice Test

(010-160) LPI Linux Essentials Practice Test

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