| By :
Dirik Hameed
Transferring network traffic from a small network like that of a small ISP to the rest of the network is known as IP transit. Two packaged services are primarily done by IP transit. The first service is all about sending the network routes to all similar smaller networks (ISPs), so that the former network can receive the network traffic of the latter. The second service is the reverse of the first; here all the other networks send their network routes so that the first network can send its network traffic. Entities or companies that provide the IP transit service in Tier 1, Tier 2 or Tier 3 networks are called IP transit suppliers. The bandwidth prices for such services are measured as per megabit per second for each month. These types of services typically require you to pay for a minimum amount of bandwidth over a fixed amount of time. The bandwidth prices vary from region to region. Using a tier 1 network for IP transit is called a Tier 1 IP transit. Tier 1 networks are also called settlement-free peering for their ability to access all other networks without purchasing IP transit or data transit. It means that all Tier 1 network is transit free network as long as it connects with other Tier 1 networks. But that does not mean all networks that are transit free are Tier 1 networks. A network can also become transit free by agreeing to settlements. If a network keeps its business agreements hidden, it is impossible to tell whether or not it pays settlements. Sometimes networks do it under non-disclosure agreements. All peering coordinator in all the internet exchanges make up the peering community. A full count of Tier 1 networks is yet to be made. All Tier 1 networks that exist today do not follow the exact definition. This is why in the business world Tier 1 networks are known as networks without explicit settlements. A network that is involved in both peering and purchasing for example IP transit redbus is classified as a Tier 2 network. To be more specific, it may be an ISP that does both peering and overt settlements. Peering is loosely defined as two networks exchanging each other's network traffic (data transit). In peering the networks do not need to pay each other but generate revenue from their respective customers. Since the term peering is used in the business world extensively, it has somewhat lost its technical meaning. The technical term is as simple as swapping the network traffic. Tier 2 networks are much more common on the net due to their versatility. For ISPs it is much easier than Tier 1 networks because of the settlement issue. A Tier 3 network pays explicit settlements for accessing all networks. In simple terms, a Tier 3 network is most likely to be a single computer that subscribes to a local ISP.
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