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  第73题      
  章/节:   计算机专业英语       

 
The Address Resolution Protocol(ARP)was developed to enable communication on an Internetwork and perform a required function in IP routing.ARP lies between layers(71)of the OSI model,and allows computers to introduce each other across a network prior to communication.APR finds the(72 )address of a host from its known(73 )address.Before a device sends a datagram to another device,it looks in its ARP cache to see if there is a MAC address and corresponding IP address for the destination device.If there is no entry,the souree device sends a(74)message to every device on the network.Each device compares the IP address to its own.Only the device with the matching IP address replies with a packet containing the MAC address for the device(except in the case of “proxy ARP”).The source device adds the(75 )device MAC address to its ARP table for future reference.
 
 
  A.  IP
 
  B.  physical
 
  C.  MAC
 
  D.  virtual
 
 
 

 
  第75题    2014年上半年  
   74%
The traditional way of allocating a single channel among multiple competing users is to chop up its (71) by using one of..
  第72题    2010年下半年  
   38%
The metric assigned to each network depends on the type of protocol. Some simple protocol, like RIP, treats each network..
  第73题    2018年下半年  
   60%
The TTL field was originally designed to hold a time stamp, which was decremented by each visited router.The datagram wa..
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