A packet is a unit of data transmitted over a network, containing a header (control information) and a payload (actual data).

Elaboration:

• Packets follow network protocols like TCP/IP for transmission.
• Dividing large data into packets allows efficient transmission and reassembly at the destination.
• Includes error-checking mechanisms like checksums.

Example:

A webpage request (HTTP GET) is broken into packets before being sent across the internet.