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免费智能真题库 > 历年试卷 > 网络工程师 > 2018年上半年 网络工程师 上午试卷 综合知识
  第72题      
  章/节:   计算机专业英语       

 
With circuit switching, a (71)path is established between two stations for communication . Switching and transmission resources within the network are (72)for the exclusive use of the circuit for the duration of the connection . The connection is(73):Once it is established ,it appears to attached devices as if there were a direct connection. Packet switching was designed to provide a more efficient facility than circuit switching for (74) data traffic. Each packet contains some portion of the user data plus control information needed for proper functioning of the network. A key distinguishing element of packet-switching networks is whether the internal operation is datagram or virtual circuit . With internal virtual circuits,a route is defined between two endpoints and all packets for that virtual circuit follow the(75)route, With internal datagrams,each packet is treated independently,and packets intended for the same destination may follow different routes.
 
 
  A.  discarded
 
  B.  abandoned
 
  C.  reserved
 
  D.  broken
 
 
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  第74题    2010年下半年  
   57%
The metric assigned to each network depends on the type of protocol. Some simple protocol, like RIP, treats each network..
  第71题    2014年上半年  
   58%
The traditional way of allocating a single channel among multiple competing users is to chop up its (71) by using one of..
  第73题    2019年上半年  
   54%
Network security consists of policies and practices to prevent and monitor(71)access,misuse, modification, or denial o..
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