The--------------protocol works in the network layer and is responsible for handling the error codes during...

The Internet Control Message Protocol (ICMP) operates at the network layer and is integral to the Internet Protocol suite. It is utilized primarily for error handling during packet delivery, such as informing senders of a failed delivery due to unreachable destinations or other path-related issues. ICMP is also used for diagnostic purposes, with tools like ping and traceroute relying on ICMP messages to test connectivity and trace packet routes. Unlike transport layer protocols like TCP or UDP, ICMP does not establish a connection before sending messages, making it a connectionless protocol. This characteristic allows ICMP to quickly relay error messages and network information without the overhead of establishing a session.

References: The role and functions of ICMP are well-documented in resources such as GeeksforGeeks, ExploringBits, and IBM’s TCP/IP concepts, which align with the ECCouncil’s Network Defender (CND) objectives and documents123.