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IP Transit can be broken down into two different services. The first being customer routes being advertised to other ISP's (Internet Service Providers). The advertisement of routes to ISP's form the other part. Commonly this is done by the use of default routes or set of routes to everywhere else on the internet. However this is not always the case. This means they are soliciting the outbound traffic from the customer towards the other networks. IP Transit can be explained by the following.
There are a number of other technical aspects to transit that you need to ask yourself or your provider about if you have it or need it. A dual IP stack is where you use a transitional protocol for IPv4 to IPv6 within the operating system. Each IP versions are used in operating systems. Each host may implement the system differently running IPv4 and IPv6 separately while another uses a hybrid system. The latter is the more common implementation in modern operating systems on both the server and for an end user.
Routing protocols have to be considered if you are happy with a static route where the route out of the network has already been pre-defined to go one way. This can be because there is only one route out from the network and thus you go through another router owned by some one else first or for cost reasons. You also have Border Gateway Protocol or BGP which is the core routing protocol of the internet by holding and updating a table of IP networks or prefixes this is used to designate the availability of a network. By Autonomous system which is a collection of connected IP routing prefixes under the control of one or more network operators and so that presents a common and clearly defined routing policy to the internet. The path information is dynamically updated because BGP is a path vector protocol. If a update gets looped through the same node this is detected and discarded and this is used in other protocols to avoid infinity loops.
You have peering, which is where networks that are separately owned and operated are interconnected to exchange the traffic between each other. The definition is actually settlement free or "the sender keeps all", this means that neither network operator will pay the other for the exchange of data between each network. This ensures that the revenue has to come from their customers. So many companies now inappropriately use the work Peering when they really mean it when payment is involved. The term "settlement free peering" is now commonly used to make sure that confusion does not occur over what is being advertised or described.
It is through metro ethernet, that datacentres talk to each other. This is because the internet uses a common framework for the use of unique IP addressing and using the BGP routing protocol. You can then get relationships between these networks and are generally placed in three categories. Transit is where you pay money to another network for internet access. Swapping and exchanging traffic for other customers is peering and is done for free and mutual benefit, or finally as a customer where another network pays you to provide them with internet access. So for a network to reach any other network on the internet it must sell transit, be a peer with that netowrk, or pay another for network transit and go round the loop until reaching the destination.
There are a number of other technical aspects to transit that you need to ask yourself or your provider about if you have it or need it. A dual IP stack is where you use a transitional protocol for IPv4 to IPv6 within the operating system. Each IP versions are used in operating systems. Each host may implement the system differently running IPv4 and IPv6 separately while another uses a hybrid system. The latter is the more common implementation in modern operating systems on both the server and for an end user.
Routing protocols have to be considered if you are happy with a static route where the route out of the network has already been pre-defined to go one way. This can be because there is only one route out from the network and thus you go through another router owned by some one else first or for cost reasons. You also have Border Gateway Protocol or BGP which is the core routing protocol of the internet by holding and updating a table of IP networks or prefixes this is used to designate the availability of a network. By Autonomous system which is a collection of connected IP routing prefixes under the control of one or more network operators and so that presents a common and clearly defined routing policy to the internet. The path information is dynamically updated because BGP is a path vector protocol. If a update gets looped through the same node this is detected and discarded and this is used in other protocols to avoid infinity loops.
You have peering, which is where networks that are separately owned and operated are interconnected to exchange the traffic between each other. The definition is actually settlement free or "the sender keeps all", this means that neither network operator will pay the other for the exchange of data between each network. This ensures that the revenue has to come from their customers. So many companies now inappropriately use the work Peering when they really mean it when payment is involved. The term "settlement free peering" is now commonly used to make sure that confusion does not occur over what is being advertised or described.
It is through metro ethernet, that datacentres talk to each other. This is because the internet uses a common framework for the use of unique IP addressing and using the BGP routing protocol. You can then get relationships between these networks and are generally placed in three categories. Transit is where you pay money to another network for internet access. Swapping and exchanging traffic for other customers is peering and is done for free and mutual benefit, or finally as a customer where another network pays you to provide them with internet access. So for a network to reach any other network on the internet it must sell transit, be a peer with that netowrk, or pay another for network transit and go round the loop until reaching the destination.
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