To understand what Unicast is about, let’s briefly review the concept of routing. It’s a process of picking the most convenient path for the traffic in a network or across many networks.
If you think about networks, the Internet, for instance, there is constant communication. A continuous exchange of data that travels around, divided into packets. To deliver such an amount of data packets, from their source to their destination, definitely require a smart routing.
Routing works based on routing information base (RIB) or routing tables. They are records of data that include the routes to different network destinations. Sometimes, they also have specific distances related to those routes. Administrators create these tables because they permanently monitor network traffic. Or they can be built through the routing protocols. That’s what they are made for.
There are different routing methods. Unicast is one of them.