Question

DNS is primarily used for:

• A. Encryption data
• B. Mapping domain names to IP address
• C. Assigning MAC address
• D. Providing TCP acknowledgements

Hint:

DNS = Name to IP conversion. Think of it as the "phonebook of the Internet".

Answer 1

The Correct Option is B

Concept: DNS (Domain Name System) is a fundamental component of the Internet that acts like a directory service. It translates human-readable domain names (such as www.google.com) into machine-readable IP addresses (such as 142.250.x.x).

Step 1: Understanding DNS Functionality When a user enters a website name in a browser, the DNS system performs the following:
• Queries DNS servers
• Resolves the domain name into an IP address
• Enables the browser to connect to the correct server

Step 2: Analyze each option
• Encryption data: This is handled by protocols like SSL/TLS, not DNS.
• Mapping domain names to IP address: This is the primary function of DNS.
• Assigning MAC address: This is done by ARP (Address Resolution Protocol).
• Providing TCP acknowledgements: This is handled by the TCP protocol at the transport layer.

Step 3: Conclusion DNS is mainly responsible for mapping domain names to IP addresses. \[ \therefore \text{Correct answer is (B)} \]