Address Resolution Protocol (ARP)
ARP stands for Address Resolution Protocol, which is a protocol used to find the media address control or MAC address.
It is used when two devices want to communicate in a LAN or Ethernet.
Various types of ARP are as follows:
- Proxy ARP
- Gratuitous ARP
- Reverse ARP
- Inverse ARP
Proxy ARP
In the proxy ARP method, layer 3 devices may respond to the ARP requests for a target that may be in a different network than the sender.
Gratuitious ARP
In this, the hosts request for an ARP to identify the duplicate IP address.
Some of the primary uses of the Gratuitious ARP is as follows:
- It is used to update the ARP table of other devices.
- It checks if the host is using an original address or not.
Reverse ARP
It is also known as RARP. RARP is a networking protocol used by the client system to request an IPV4 address from the ARP rooter table in a LAN system.
When a new system is set up, the user will need to find a new IP address as it has no memory of the IP address. Then the device sends a RARP broadcast packet, and the MAC address, a host is then installed inside of the local network called the RARP-server. The RARP server sends the response packet along with the IP address to the requesting computer.
Inverse ARP
It is the inverse of ARP, and is used to find the IP addresses of the nodes from the Data Link layer.
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