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RARP stands for Reverse Address Resolution Protocol.

Static entry: It is an entry where someone manually enters the IP to MAC address association by using the ARP command utility.

Dynamic entries are not permanent, and they are removed periodically.

Dynamic entry: It is an entry which is created automatically when the sender broadcast its message to the entire network.

In the above screenshot, we observe the association of IP address to the MAC address. Note: ARP cache is used to make a network more efficient. We can check the ARP cache in command prompt by using a command arp -a.

If the device receives the MAC address, then the MAC address gets stored in the ARP cache.

Once the MAC address is received by the device, then the communication can take place between two devices.

The device that has the matching IP address will then respond back to the sender with its MAC address.

If ARP cache is empty, then device broadcast the message to the entire network asking each device for a matching MAC address.

It will check the ARP cache in command prompt by using a command arp-a. The device will first look at its internet list, called the ARP cache to check whether an IP address contains a matching MAC address or not.If a device wants to communicate with another device, the following steps are taken by the device: The host holding the datagram adds the physical address to the cache memory and to the datagram header, then sends back to the sender. Every host on the network receives and processes the ARP packet, but only the intended recipient recognizes the IP address and sends back the physical address. If the host wants to know the physical address of another host on its network, then it sends an ARP query packet that includes the IP address and broadcast it over the network. IP address: It is an address used to locate a device on the network. Note: MAC address: The MAC address is used to identify the actual device. ARP is used to find the MAC address of the node when an internet address is known. For example, if the NIC on a particular machine fails, the MAC address changes but IP address does not change. Therefore, we can say that devices need the MAC address for communication on a local area network. Each device on the network is recognized by the MAC address imprinted on the NIC.It is used to associate an IP address with the MAC address.ARP stands for Address Resolution Protocol.TCP/IP supports the following protocols: ARP