[e2e] Port numbers in the network layer?
braden at isi.edu
Tue Apr 23 12:24:46 PDT 2013
During the development of TCP during the 1977-1980 period, the original
C&K TCP layer was divided into a transport layer (TCP) and an
internetwork layer (IP). One of the key decisions in this split was
which layer should inherit the port numbers. At the time I simply
accepted the group decision to put ports into the transport layer
without taking time to think through the architectural implications. Has
anyone ever thought through how the architecture would have been changed
had ports ended up in the internetwork layer, i.e., in IP?
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