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A Tier 2 network is an Internet service provider which engages in the practice of peering with other networks, but which also purchases IP transit to reach some portion of the Internet.

Tier 2 providers are the most common Internet service providers, as it is much easier to purchase transit from a Tier 1 network than to peer with them and attempt to become a Tier 1 carrier.

The term Tier 3 is sometimes also used to describe networks who solely purchase IP transit from other networks to reach the Internet.

List of large or important Tier 2 networks

See also

• Peering
• Network access point

References

1. Norton, William B. "What is a Tier 2 ISP?". DrPeering. Retrieved 15 September 2023.
2. "AS Rank: A ranking of the largest Autonomous Systems (AS) in the Internet". asrank.caida.org.
3. Visualizing Internet Topology at a Macroscopic Scale April 2005
4. "CAIDA AS Rank". 2016-01-25. Retrieved 2015-07-29.
5. "Cogent - Google - HE Fun". 2016-03-09.

• Internet architecture