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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 it is to peer with them and attempt becoming 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[edit]

The ASxxx refer to each network's "IANA-assigned "AS number.

See also[edit]


  1. ^ "CAIDA AS Rank". 2016-01-25. Retrieved 2015-07-29. 
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