Of what use is an address-resolution protocol ?Why is it better to use such a protocol than to make each host read each packet to determine that packet's destination? Does a token-passing network need such a protocol? Explain your answer.
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An ARP translates general-purpose addresses into hardw are interface numbers so the interface can know which packets are for it.Software need not get involved.It is more efficient than passing each packet to the higher layers.Yes,for the same reason.