What is Address Resolution Protocol?
The Address Resolution Protocol (ARP) is a protocol used in computer networks to map an IP address to a physical or MAC address on a local network. It is responsible for resolving network layer addresses (IP addresses) into link layer addresses (MAC addresses) for the purpose of communication.
Purpose of Address Resolution Protocol
The main purpose of ARP is to enable communication between devices within a local network by obtaining the MAC address associated with a particular IP address. ARP ensures that data packets are sent to the correct destination in a network, allowing devices to communicate and exchange information effectively.
Example of Address Resolution Protocol
For instance, when a device wants to send data to another device in the same network using its IP address, it needs to know the corresponding MAC address. It sends an ARP request, broadcasting a message to all devices on the network, asking for the MAC address associated with that IP address. The device with the matching IP address responds with its MAC address, which allows the sender to establish a direct connection.