What role does DNS play in TCP/IP?

What role does DNS play in TCP/IP?

• A. Mapping computer names to IP addresses
• B. Encrypting data
• C. Providing DHCP
• D. Routing packets

Answer: (A)

DNS translates human-friendly domain names into IP addresses, and that mapping is essential in TCP/IP because routers and the protocol stack deliver data to numeric IP addresses, not names. When you access a URL like example.com, your device asks DNS for the corresponding IP address; once it has that address, the TCP/IP stack can establish a connection and route packets to the correct machine. DNS makes networks usable by letting people remember names instead of numerical addresses, while the actual data transfer relies on IP addresses. Encryption of data is handled by protocols like TLS/SSL, not DNS. DHCP is the mechanism that assigns IP addresses to devices on a network. Routing packets is the job of routers using IP addressing and routing tables, not DNS.

DNS translates human-friendly domain names into IP addresses, and that mapping is essential in TCP/IP because routers and the protocol stack deliver data to numeric IP addresses, not names. When you access a URL like example.com, your device asks DNS for the corresponding IP address; once it has that address, the TCP/IP stack can establish a connection and route packets to the correct machine. DNS makes networks usable by letting people remember names instead of numerical addresses, while the actual data transfer relies on IP addresses.

Encryption of data is handled by protocols like TLS/SSL, not DNS. DHCP is the mechanism that assigns IP addresses to devices on a network. Routing packets is the job of routers using IP addressing and routing tables, not DNS.