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Classical IP

An IETF standard for transmitting IP traffic in an ATM network. Classical IP performs the conversion from the IP addresses in the packets into ATM addresses as long as the destination is within the same subnet. Routing between networks is not supported. The Classical IP-enabled driver in the end station sends out an ARP request to a Classical IP-enabled ARP server, which returns the ATM address. See ARP.


(Address Resolution Protocol) A TCP/IP protocol used to obtain a node's physical address. A client station broadcasts an ARP request onto the network with the IP address of the target node it wishes to communicate with, and the node with that address responds by sending back its physical address so that packets can be transmitted. ARP returns the layer 2 address for a layer 3 address. See ARP cache, ARP cache poisoning, RARP and TCP/IP abc's.

The IP protocol broadcasts the IP address of the destination station onto the network, and the node with that address responds.

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