2. 计算机
  3. In　low　-　speed　network　,it　is　usually　adequate　to　wait　for　congestion　to　occur　and　then　react　to　it　by　telling　the　source　of　pac

In　low　-　speed　network　,it　is　usually　adequate　to　wait　for　congestion　to　occur　and　then　react　to　it　by　telling　the　source　of　pac

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问题 In　low　-　speed　network　,it　is　usually　adequate　to　wait　for　congestion　to　occur　and　then　react　to　it　by　telling　the　source　of　packets　to　slow　down.　In　high　-　speed　networks,　this　approach　often　works　poorly,　because　in　the(71)between　sending　the　notification　and　notification　arriving　at　the　source,　thousands　of　additional(72)may　arrive.　In　ATM　network　,　a　major　tool　for　preventing(73)is(74)control.　　When　a　host　wants　a　new　virtual(75),it　must　describe　the　traffic　to　be　offered　and　the　service　expected.
选项 A、collision
B、congestion
C、drop
D、delay
答案B
解析 congestion：阻塞
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