Understanding DNS and Domain Names

The video explains the Domain Name System (DNS), which translates human-readable domain names into IP addresses, allowing users to access websites without memorizing numerical addresses. It describes the hierarchical structure of DNS, starting from root servers to top-level domains, and details the process of resolving domain names to IP addresses. The video highlights the scalability and efficiency of DNS, emphasizing its role in making the internet user-friendly.

What does DNS stand for?

• Domain Name System

• Domain Network Service

• Digital Network System

• Data Name Service

Why are IP addresses not ideal for internet users?

• They are not unique

• They change frequently

• They are not human-readable

• They are too long to remember

What is the primary function of DNS?

• To manage internet traffic

• To store web pages

• To translate domain names to IP addresses

• To provide internet security

What is an example of a domain name?

• 255.255.255.0

• 10.0.0.1

• google.com

• 192.168.1.1

What does a computer check first when resolving a domain name?

• The hosting server

• The cache

• The root server

• The top-level domain server

What is the role of a root server in DNS?

• To provide security for DNS queries

• To manage internet traffic

• To store information about top-level domains

• To store all domain names

Which of the following is a top-level domain?

• example.com

• google.com

• www.example.com

• edu

Why is DNS set up as a hierarchy?

• To improve security

• To reduce the number of IP addresses

• To increase internet speed

• To make the system scalable

What is a subdomain in DNS?

• A domain that is used for testing

• A domain that is not registered

• A domain that is part of a larger domain

• A domain that is not accessible

How does DNS improve the efficiency of searching for domain names?

• By caching all domain names

• By using a hierarchical structure

• By using shorter domain names

• By storing all domain names in one place