Why do we use domain names in the Internet?

Why do we use domain names in the Internet?

• A. A domain name is the actual numeric IP address used by routers.
• B. A domain name is a human-friendly address that maps to an IP, making websites easier to access.
• C. A domain name is used only for email addresses.
• D. A domain name is a protocol to transfer web pages.

Answer: (B)

Domain names exist because computers use numeric addresses to locate devices, but people remember words better than strings of numbers. A domain name is a human-friendly label that maps to an IP address. When you type a website name, your computer asks the DNS system to translate that name into the numeric address where that site lives, then the browser connects to that address and loads the page. This separation makes browsing easier and stable: the underlying IP can change without you changing the name you type, and you can recognize sites by familiar words rather than numbers. The other ideas miss the point: the actual routing on the Internet uses IP addresses, not domain names; domain names aren’t restricted to emails but are used for many resources, including websites; and domain names are not a protocol for transferring pages—that role belongs to protocols like HTTP or HTTPS.

Domain names exist because computers use numeric addresses to locate devices, but people remember words better than strings of numbers. A domain name is a human-friendly label that maps to an IP address. When you type a website name, your computer asks the DNS system to translate that name into the numeric address where that site lives, then the browser connects to that address and loads the page. This separation makes browsing easier and stable: the underlying IP can change without you changing the name you type, and you can recognize sites by familiar words rather than numbers.

The other ideas miss the point: the actual routing on the Internet uses IP addresses, not domain names; domain names aren’t restricted to emails but are used for many resources, including websites; and domain names are not a protocol for transferring pages—that role belongs to protocols like HTTP or HTTPS.