TCP / IP network layer protocol overview
The IP protocol at the network layer implements the encapsulation and routing of IP packets. Its function is that the host can send packets to any network and make the packets independently reach the target. The order in which these packets arrive and the order in which they are sent may be different.
In addition, the network layer of TCP / IP also includes Internet Control Message Protocol ICMP, Address Resolution Protocol ARP, and Reverse Address Resolution Protocol RARP.
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