The Address Resolution Protocol(ARP)was Developed to enable Communication on An Internet work And perform A required function in IP routing.ARP lies Between layers( 1 )of the OSI model,and Allows Computers to introduce each other Across A network prior to Communication.APR finds the( 2 )address of A host from its known( 3 )address.Before A Device sends A Data gram to Another Device,it looks in its ARP Cache to see if there is A MAC Add ress And Corresponding IP Address for the Destination Device.If there is no entry,the source Device sends A( 4  )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( 5 )device MAC Address to its ARP table for future reference.

1)A.1And 2

B.2And 3

C.3And 4

D.4And 5

2)A.IP

B.logical

C.hardware

D.network

3)A.IP

B.physical

C.MAC

D.virtual

4)A.unicast

B.multicast

C.broadcast

D.point-to-point

5)A.source

B.destination

C.gateway

D.proxy

信管网参考答案：B 、C 、A 、C 、B

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