What Does Autonomous System (AS) Mean?
An autonomous system (AS) is a network or a collection of networks that are all managed and supervised by a single entity or organization.
Techopedia Explains Autonomous System (AS)
Autonomous systems were introduced to regulate organizations such as Internet service providers (ISP), educational institutions and government bodies. These systems are made up of many different networks but are operated under the umbrella of a single entity for easy management. Large enterprises tend to have large network infrastructures with many smaller networks, dispersed geographically but connected using a similar operating environment.