![]() ![]() Note that in general, routers will not maintain IP-to-MAC address mappings for devices on other networks. This feature reveals both IP and MAC addresses for every device currently joined to the home network. Most home broadband routers allow viewing of their ARP caches through their Web-based administrative interface. ![]() From the cache it is possible to derive an IP address from a MAC address however, the mechanism is limited in many respects. These caches are available on individual network adapters and also on IP routers. There is no universal mechanism for an end user to determine an IP address from MAC address, although it can be done in certain specific situations.ĪRP maintains a list of both IP addresses and matching MAC addresses called the ARP cache. ARP was not designed to translate MAC address to IP address, however.Ĭomputers can determine IP addresses from MAC addresses using DHCP (and formerly other protocols like RARP and InARP). A MAC address represents the physical identifier of a network adapter, while the IP address represents a logical device address on Internet Protocol networks.Ī built-in feature of IP, Address Resolution Protocol (ARP) translates IP addresses to MAC addresses. ![]()
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