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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 and/or some Tier 1 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 ...
Tier III: full N+1 redundancy of all systems, including power supply and cooling distribution paths Tier IV : as Tier III, but with 2N+1 redundancy of all systems A Tier III system is intended to operate at Tier II resiliency even when under maintenance, and a Tier IV system is intended to operate at Tier III resiliency even when under maintenance.
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. [ 1 ] 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 ...
Altice USA (also known as Optimum); AT&T Internet; Charter Communications (also known as Spectrum); Comcast High Speed Internet (also known as Xfinity); Consolidated Communications (including FairPoint Communications)
This is a list of school districts in Texas, sorted by Education Service Center (ESC) Region and then by County.. There are multiple classifications of school districts. Among them are independent school districts, common school districts, municipal school districts, rural high school districts, industrial training school districts, rehabilitation districts for the handicapped, and several ...
The main offices of the Texas Education Agency are located in the William B. Travis State Office Building in Austin The entrance to the Lamar High School auditorium in Houston is decorated with a map of the state of Texas. Texas has over 1,000 school districts—ranging in size from the gigantic Houston Independent School District to the Divide ...
Middle school students were rezoned to Albert Thomas Middle. [16] Ericka Mellon of the Houston Chronicle stated in 2015 that Woodson K-8 "performs well below the district average" although most Texas accountability test scores for the school increased during the period 2013–2014. [17] In 2015 Children at Risk ranked Woodson K-8 an "F". [17]
Examples of large peering points without public data are NAP of the Americas or PacketExchange. Neither is it any longer authoritative, as companies aggregate their data capacity. For example, as of 2024, the top two entries each contained data for about 40 separate locations, in one case on four different continents.