Packet

Formatted block of data used in telecommunications.

data packet network packet

In telecommunications, a packet is a formatted block of data representing a portion of a larger message or file. Packets are used to transmit data over digital networks, such as the internet.

/ˈpækɪt/

The term 'packet' comes from the postal system, where a packet is a sealed bundle of letters or documents.

Imagine sending a letter - a packet is like that letter, carrying bits of information across the internet or phone lines.

Packets contain addressing information to ensure they reach the correct destination
The concept of packet switching was developed in the 1960s by Paul Baran and Donald Davies
Packet size is carefully managed to optimize network performance

What is a packet? A small unit of data transmitted over a network
How are packets used? They break down large files into smaller pieces for efficient transfer
What happens to a packet? It travels from sender to receiver, potentially passing through multiple routers

data unit block of data

data unit network protocol

TCP packet UDP packet IP packet

header payload

network internet

communication technology data communication