Glossary: TCP/IP in Depth, Part 2
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A header field that lets the receiver detect damage. In UDP and TCP it covers the header, the data and a pseudo-header, so a router doing NAT must recompute it after changing an address.
Glossary: TCP/IP in Depth, Part 2
A header field that lets the receiver detect damage. In UDP and TCP it covers the header, the data and a pseudo-header, so a router doing NAT must recompute it after changing an address.