Which Protocol works on network layer?

A. Internet protocol (IP)

B. UDP (User Datagram Protocol)

C. SMTP (Simple Mail Transfer Protocol)

D. HTTP (Hyper Text Transfer Protocol)

Correct Answer is :

A. Internet protocol (IP)

Explanation

Protocols that work on the Network Layer include:

• IP (Internet Protocol) → IPv4 and IPv6 (main protocol for logical addressing & routing).
• ICMP (Internet Control Message Protocol) → used for error reporting and diagnostics (e.g., ping, traceroute).
• IGMP (Internet Group Management Protocol) → manages multicast group memberships.
• IPsec (Internet Protocol Security) → provides authentication and encryption at the network layer.