An Autonomous System (AS) is a collection of IP routing prefixes under the control of one or more network operators. Each AS is assigned an ASN for use in BGP routing, which are assigned by Regional Internet Registries (RIRs). The IANA also reserves some ASNs for private use. AS numbers were originally 16-bit integers, but have since been expanded to 32-bit integers. There are currently over 100,000 allocated ASNs and over 60,000 unique autonomous networks in the Internet's routing system.
Stanford University
Winter 2022–2023
Stanford University's CS 249i is an advanced networking course focusing on modern Internet topology, routing practices, and recent network protocols. The course covers pressing privacy, security, and abuse challenges, with a mix of lectures, guest talks, and practical projects.
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