What is ARP and why I am using it?

This is the first post of networks category in the web. As this is one of my most interesting topics but I don’t have enough knowledge about it, I will write down each thing I learn about it. Let’s start with ARP.

What is ARP?

ARP is the acronym of Address Resolution Protocol. It is a comunication protocol used for discovering physical addresses (MAC addresses) of the resources within a network.

Where ARP is used?

It operates in the layer 2 of the OSI model, the Data Link Layer.

How ARP works?

It’s a request-response protocol. It’s only used withing a subnetwork and it’s never routed.

ARP package structure

You can have a look here for the package structure and more info.

That’s all for today. Keep learning.