Flow　control　is　a　function　that　prevents　network　congestion　by　ensuring　that(66)do　not　over-whelm(67)with　data.　There　are　three　

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问题 Flow　control　is　a　function　that　prevents　network　congestion　by　ensuring　that(66)do　not　over-whelm(67)with　data.　There　are　three　commonly　used　methods　for　handling　network　congestion.(68)is　used　by　network　devices　to　temporarily　store　bursts　of　excess　data　in　memory　until　they　can　be　processed.(69)are　used　by　receiving　devices　to　help　prevent　their　buffers　from　overflowing.(70)is　a　flow-control　scheme　in　which　the　source　device　requires　an　acknowledgment　from　the　destination　after　a　certain　number　of　packets　have　been　transmitted.

选项 A、Buffer
B、Source-quench　messages
C、window
D、Windowing
E、Buffering

答案D

解析流量控制是一种通过确保(66)的数据不淹没(67)的防止网络拥塞的功能。通常有三种方法来解决网络拥富。网络设备用(68)来暂存内存中过多的数据只到其得到处理；接收设备用(69)来帮助防止缓冲区溢出。(70)是一种流量控制策略，在这种策略中，源端收到目标端发来的确认信息，确定所发送的某一数据包已传输。

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