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总线型拓扑结构和环型拓扑结构的主要缺点是(19)。

  • A.某一结点(一般指中心结点)可能成为网络传输的瓶颈
  • B.这种网络所使用的通信线路最长,不易维护
  • C.网中任何一个结点的线路故障都可能造成全网的瘫痪
  • D.网络的拓扑结构复杂,成本高
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