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  第75题      
  章/节:   专业英语       

 
We have already covered the topic of network addresses. The first (71) in a block (in classes A, B, and C) defines the network address. In classes A, B, and C, if the hostid is all Is, the address is called a direct broadcast address. It is used by a (72) to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a (73) address in an IP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A, B,and C.
In classes A, B, and C, an address with all Is for the netid and hostid (32 bits) define a (74) address in the current network. A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However, a router will block a packet having this type of address to confine the broadcasting to the (75) network. Note that this address belongs to class E.
 
 
  A.  neighb
 
  B.  next
 
  C.  remote
 
  D.  local
 
 
 

 
  第71题    2013年下半年  
   58%
OSPF is a link-state routing protocol. It is designed to be run internal to a single (71) system. Each OSPF router maint..
  第75题    2015年上半年  
   65%
Routers perform the decision process that selects what path a packet takes. These (71) layer devices participate it th..
  第72题    2015年上半年  
   74%
Routers perform the decision process that selects what path a packet takes. These (71) layer devices participate it th..
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第75题    在手机中做本题