What is unicast addressing?

Unicast is one-to-one: a single sender to a single specific receiver. It is the most common type and works in both IPv4 and IPv6.

* Unicast: one sender to one specific receiver. *

A unicast message is sent from one sender to one specific receiver.

Characteristics:

• Most common type of communication
• Source knows exact destination
• Uses specific destination address
• Works in both IPv4 and IPv6

Examples:

• Web browsing (your PC to web server)
• Email (client to mail server)
• SSH session

Memory tip: Unicast = "UNI" (one) - one specific destination!

Go deeper:

• Unicast — one-to-one transmission, the default for TCP/UDP traffic.