What is the primary function of the Domain Name System (DNS) in the Internet?

What is the primary function of the Domain Name System (DNS) in the Internet?

• A. It assigns email routing rules.
• B. It translates domain names into IP addresses.
• C. It encrypts web traffic.
• D. It determines the physical route for packets.

Answer: (B)

Think of DNS as the Internet’s phone book. Its main job is to translate friendly domain names into the numeric IP addresses computers use to reach the right server. When you type a name, your device asks a DNS resolver, which looks up the address and returns it so your browser can connect. This name-to-address translation makes it easy to visit sites without memorizing numbers. The other ideas describe separate tasks: encrypting web traffic is handled by TLS/HTTPS, not DNS; determining the physical route for packets is done by routers and routing protocols, not DNS; and while DNS can include information to help email servers find where to deliver mail, that’s not its primary purpose.

Think of DNS as the Internet’s phone book. Its main job is to translate friendly domain names into the numeric IP addresses computers use to reach the right server. When you type a name, your device asks a DNS resolver, which looks up the address and returns it so your browser can connect. This name-to-address translation makes it easy to visit sites without memorizing numbers.

The other ideas describe separate tasks: encrypting web traffic is handled by TLS/HTTPS, not DNS; determining the physical route for packets is done by routers and routing protocols, not DNS; and while DNS can include information to help email servers find where to deliver mail, that’s not its primary purpose.