ARP Last modified: Tuesday, August 31, 2004
Short for Address Resolution Protocol, a network layer protocol used to convert an IP address into a physical address (called a DLC address), such as an Ethernet address. A host wishing to obtain a physical address broadcasts an ARP request onto the TCP/IP network. The host on the network that has the IP address in the request then replies with its physical hardware address. There is also Reverse ARP (RARP) which can be used by a host to discover its IP address. In this case, the host broadcasts its physical address and a RARP server replies with the host's IP address.
•E-mail this definition to a colleague• For internet.com pages about ARP . Also check out the following links! Address Resolution Protocol Overveiw Describes how the Address Resolution Protocol (ARP) works, with information about ARP messages and their format. RFC 826 Request for Comments document for the Ethernet Address Resolution Protocol (ARP).	Internet Protocols Networks ARP spoofing protocol RARP Give Us Your Feedback Shopping ARP Products Compare Products,Prices and Stores Shop by Category: Networking Hubs and Switches 341 Model Matches Routers 55 Model Matches IP Phones 20 Model Matches Sport and Outdoor 468 Store Offers