What does DNS do?

What does DNS do?

• A. Translates human-readable domain names into IP addresses.
• B. Routes packets between networks.
• C. Encrypts data at rest.
• D. Assigns device MAC addresses.

Answer: (A)

DNS maps domain names to IP addresses. It lets you type a human-friendly name like example.com and have the system look up the numeric address the network uses to reach that server. In other words, it’s the directory that translates names into the addresses devices need to connect. Without this lookup, you'd have to remember and use actual IP addresses for every site. The other ideas don’t fit DNS: routing packets between networks is handled by routers; encrypting data at rest is about protecting stored data, not locating servers by name; and assigning MAC addresses is about hardware addressing on local networks, not resolving names to addresses.

DNS maps domain names to IP addresses. It lets you type a human-friendly name like example.com and have the system look up the numeric address the network uses to reach that server. In other words, it’s the directory that translates names into the addresses devices need to connect. Without this lookup, you'd have to remember and use actual IP addresses for every site.

The other ideas don’t fit DNS: routing packets between networks is handled by routers; encrypting data at rest is about protecting stored data, not locating servers by name; and assigning MAC addresses is about hardware addressing on local networks, not resolving names to addresses.