TCP header
2.When a TCP segment is received, the TCP router knows which port to pass it to by looking at the port number in the TCP header.
6.the protocol translation implements the algorithm of IP header between IPv4 and IPv6,between ICMPv4 and ICMPv6 and the upate of checksum field of TCP/UDP. In the end,We implemented translation gateway by VC++6.0 and Windows DDK,meanwhile, examined Latency of traslating packet,Bandwidth of network and the operation of familiar application.

