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Under what circumstances an open-loop error control protocol
(e.g., an error correcting Hamming code)
is preferable to feedback type protocols
(e.g., ARQ retransmission protocols)
for error control?
One of the problems with layered network architectures is the potential for duplication of functionality at different layers, which might lead to inefficiencies; give an example of this.
 The ATM cell format and the IP datagram format include a header checksum
(i.e., a checksum covering the header but not the payload). Why?
Wed Mar 13 15:53:29 PST 1996