试题内容
If two communicating entities are in different hosts connected by a network，there is a risk that PDUs will not arrive inthe order inwhich theywere sent ， becausethey may traverse(70)paths through the network. If each PDUs is given a uniquenumber，andnumbersareassigned(71)，thenit isa logicallysimpletaskforthereceivingentityto reorder(72 )PDUsonthebasisofsequence number.Aproblem with this scheme is that，with a(73)sequence number field， sequence number will repeat.Evidently ， the maximumsequence numbermustbe(74)thanthemaximumnumber ofPDUsthatcouldbe outstandingat anytime.
（70）A.same
B.different
C.single
D.Unique
（71）A.randomly
B.equally
C. uniformly
D. Sequentially
（72）A.received
B.sent
C.transmitting
D.Forwarding
（73）A.various
B.diverse
C.finite
D.infinite
（74）A.smaller
B.greater
C.less
D.More
查看答案
（70）A.same
B.different
C.single
D.Unique
（71）A.randomly
B.equally
C. uniformly
D. Sequentially
（72）A.received
B.sent
C.transmitting
D.Forwarding
（73）A.various
B.diverse
C.finite
D.infinite
（74）A.smaller
B.greater
C.less
D.More
软题库参考答案：B、D、A、C、B（仅供参考）
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