What Is an Address Resolution Protocol and why Do We Care?

ARP 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. Discuss multiplexing: To combine multiple signals (analog or digital) for transmission over a single line or media. …