Linux Administration Bootcamp: Go from Beginner to Advanced - Networking - Domain Name System (DNS) and Hostnames

This video tutorial covers the basics of managing IP addresses and network interfaces on a Linux system. It explains how to use the IP and ifconfig commands to display and configure network settings. The tutorial also delves into setting and retrieving hostnames, understanding DNS, and using the host and dig tools for name resolution. Additionally, it discusses the role of the Etsy hosts file and how to configure name resolution order using the nsswitch file.

Which command is considered deprecated but still available on many Linux systems for displaying IP addresses?

• ping

• netstat

• ip

• ifconfig

What is the loopback device's IP address on a Linux system?

• 10.0.0.1

• 172.16.0.1

• 127.0.0.1

• 192.168.1.1

What is a hostname in the context of networking?

• A human-readable name for a device

• A type of DNS record

• A type of IP address

• A network protocol

Which command can be used to display the fully qualified domain name (FQDN) of a system?

• uname -n

• ifconfig

• ip addr

• hostname -f

What is the primary purpose of DNS?

• To assign IP addresses to devices

• To translate IP addresses into human-readable names

• To configure firewalls

• To manage network interfaces

What does FQDN stand for?

• Fully Queried Domain Name

• Fully Qualified Domain Name

• Full Quality Domain Name

• Full Query Domain Name

What is the purpose of the 'Etsy hosts' file?

• To manage user accounts

• To store DNS server addresses

• To map IP addresses to hostnames locally

• To configure network interfaces

How can the 'Etsy hosts' file be used in a network?

• To override DNS entries

• To manage user permissions

• To configure network protocols

• To set up firewalls

What does the 'Etsy nsswitch.conf' file control?

• The DNS server configuration

• The order of name resolution

• The list of available network interfaces

• The system's firewall settings

In the 'Etsy nsswitch.conf' file, what does the 'hosts' line determine?

• The order of DNS server queries

• The system's IP address

• The order of name resolution methods

• The list of available hostnames