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

A. Internet protocol (IP)

Explanation :

<p><span style="font-size: 14px;">Protocols that work on the Network Layer include:</span></p><ul><li><span style="font-size: 14px; background-color: rgb(255, 255, 0);">IP (Internet Protocol) → IPv4 and IPv6 (main protocol for logical addressing &amp; routing).</span></li><li><span style="letter-spacing: 0.01rem;">ICMP (Internet Control Message Protocol) → used for error reporting and diagnostics (e.g., ping, traceroute).</span></li><li><span style="letter-spacing: 0.01rem;">IGMP (Internet Group Management Protocol) → manages multicast group memberships.</span></li><li><span style="letter-spacing: 0.01rem;">IPsec (Internet Protocol Security) → provides authentication and encryption at the network layer.</span></li></ul>