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2. Tier 1 network - Wikipedia

   en.wikipedia.org/wiki/Tier_1_network

   Relationship between the various tiers of Internet providers. There is no authority that defines tiers of networks participating in the Internet. [1] The most common and well-accepted definition of a Tier 1 network is a network that can reach every other network on the Internet without purchasing IP transit or paying for peering. [2]

3. Internet transit - Wikipedia

   en.wikipedia.org/wiki/Internet_transit

   Transit is distinct from peering, in which only traffic between the two ISPs and their downstream customers is exchanged and neither ISP can see upstream routes over the peering connection. A transit free network uses only peering; a network that uses only unpaid peering and connects to the whole Internet is considered a Tier 1 network. [1]

4. Internet service provider - Wikipedia

   en.wikipedia.org/wiki/Internet_service_provider

   Tier 2 ISPs depend on Tier 1 ISPs and often have their own networks, but must pay for transit or internet access to Tier 1 ISPs, but may peer or send transit without paying, to other Tier 2 ISPs. Tier 3 ISPs do not engage in peering and only purchase transit from Tier 2 and Tier 1 ISPs, and often specialize in offering internet service to end ...

5. Talk:List of tier 1 internet service providers - Wikipedia

   en.wikipedia.org/wiki/Talk:List_of_tier_1...

   Tier 1 ISPs are also characterized by being: Directly connected to each of the other tier-1 ISPs; Connected to a large number of tier-2 ISPs and other customer networks; International in coverage. Tier 1 ISPs are also known as Internet backbone networks. As of this writing, UUNet (a subsidiary of WorldCom) is the largest Tier 1 ISP; other major ...

6. Talk:Tier 1 network - Wikipedia

   en.wikipedia.org/wiki/Talk:Tier_1_network

   By this definition, a tier 1 network is a transit-free network that peers with every other tier-1 network." Comcast is a Tier 3 network. Level 3 can reach Comcast's network without ever paying a fee (as per the Tier 1 definition). The issue is that Comcast now wants to charge to forward data on its network to its USERS.

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8. Internet rush hour - Wikipedia

   en.wikipedia.org/wiki/Internet_Rush_Hour

   Tier 2 and Tier 3 ISPs are customers of the Tier 1 ISPs and rely on the Tier 1 ISPs to route their traffic across the Internet. This is a disadvantage for the lower tier ISPs due to the amount of traffic hops and shared common gateways to Tier 1 ISPs. [5] The shared common gateways are choke points that contribute to the Internet Rush Hour ...

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