2. 计算机
  3. Anytime a host or a router has an IP datagram to send to another host or router，it has the (71)________________ address of th

Anytime a host or a router has an IP datagram to send to another host or router，it has the (71)________________ address of th

admin2020-05-13  6
问题 Anytime a host or a router has an IP datagram to send to another host or router，it has  the  (71)________________  address of the receiver．This address is obtained from the DNS if the sender  is the host or it is found in a routing table if the sender is a router．But the IP datagram  must be (72)________________  in a frame to be able to pass through the physical network．This means that  the sender needs the  (73)________________ address of the receiver．The host or the router sends an ARP  query packet．The packet includes the physical and IP addresses of the sender and the IP  address ofthe receiver．Because the sender does not know the physical address ofthe receiver，the  query is (74)________________ over the network．Every host or router on the network receives and processes the  ARP query packet, but only the intended recipient  recognizes its IP address and sends back an ARP  response packet．The response packet contains the recipient’s IP and physical addresses．Thepacket  is (75)________________ directly to the inquirer by using the physical address received in the query packet．
选项 A、port
B、hardware
C、physical
D、10gical
答案D
解析
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