Final answer:
The protocols IP, ICMP, ARP, and RARP are part of the Internet Layer of the TCP/IP model, responsible for packet routing and address resolution.
Step-by-step explanation:
The IP, ICMP, ARP, and RARP protocols are part of the Internet Layer of the TCP/IP model, which is responsible for routing packets across network boundaries to their destination host. This layer ensures that data packets are sent to the correct address and that packets are reassembled into their original state at the destination.
IP, or Internet Protocol, is the primary protocol in this layer, responsible for addressing and routing packets. ICMP, or Internet Control Message Protocol, is used for error messages and operational queries. ARP, or Address Resolution Protocol, and its counterpart RARP, Reverse Address Resolution Protocol, are both utilized for the resolution of network layer addresses into link layer addresses (physical address like MAC addresses).