Understanding Address Resolution Protocol
The Address Resolution Protocol (ARP) is a protocol used in computer networks to map an IP address to a physical (MAC) address. It is a vital part of the communication process between devices on a network. ARP allows devices to send packets to other devices on the same network by resolving the IP address to the MAC address.
Purpose of Address Resolution Protocol
The main purpose of ARP is to provide a mechanism for devices to dynamically discover and map the MAC address of another device on the same network. By sending an ARP request, a device can query for the MAC address associated with a known IP address. This mapping is then stored in the device's ARP cache, allowing for efficient communication between devices.
Address Resolution Protocol Function
- ARP is responsible for mapping IP addresses to MAC addresses, enabling devices to communicate on a local network.
- It works by sending ARP requests to the network, asking if any device knows the MAC address associated with a specific IP address.
- Once a response is received, the device updates its ARP cache, allowing for faster communication in the future.
Dynamic Reverse Address Resolution Protocol
Dynamic Reverse Address Resolution Protocol (RARP) is the opposite of ARP. RARP is used to obtain an IP address given a known MAC address. It allows a device without an IP address to request an IP address from a RARP server based on its MAC address. RARP is commonly used in diskless workstations and booting processes.