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第15题:文中( 2 )处正确的答案是(  )。

  • A.V24
  • B.V28
  • C.V11
  • D.V10
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第69题:文中( 2 )处正确的答案是(  )。

  • A.48/SB
  • B.CRC
  • C.Manchester Code
  • D.Huffman Code

:根据下面的文字资料回答 63~67 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 oftenworks poorly,because in the( 1 )between sending the

notification and notification arriving at the source,thousands of

  • additional( 2 )may aITive.In ATM network,a major tool for    preventing( 3 )is( 4 )control.when a host wants a new virtual( 5 ),it must
  • describe the traffic to be offered and the service expected.    第63题:文中( 1 )处正确的答案是(  )。
  • A.interval
  • B.time
  • C.slot
  • D.delay
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