Glossary: What is an Autonomous System?

Autonomous Systems manage IP networks, enabling efficient routing across the internet using protocols like BGP and unique AS numbers.

What is an Autonomous System?

An Autonomous System (AS) is a collection of IP networks operated by a single organisation that presents a unified routing policy to the internet. It ensures efficient data routing within and between networks.

Explanation

Each AS is assigned a unique Autonomous System Number (ASN) by a regional internet registry. It uses protocols like BGP (Border Gateway Protocol) to exchange routing information with other ASes, enabling smooth data transmission across the internet.

Practical Example of an Autonomous System

Internet service providers (ISPs) and large organisations manage their own AS to control how data flows through their network and interacts with external networks.

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