Internet transit

Two bundled services are what internet transit consists of. The advertisement by an Internet Service Provider (ISP) of routes to a customer's IP (Internet Protocol) addresses to the other ISPs who constitute the rest of the Internet.

This thereby is soliciting inbound traffic from them on behalf of the customer; and the advertisement of a default route, or a full set of routes to all of the destinations on the Internet, to the ISP's customer, thereby soliciting outbound traffic from them.

The transit service is typically priced per megabit per second per month, and customers are often required to commit to a minimum volume of bandwidth, and usually to a minimum term of service as well.

"Service level agreements" are provided with some transit agreements, which purport to offer money-back guarantees of performance between the customer's internet connection and specific points on the internet, typically major internet exchange points within a continental geography such as North America.

These service level agreements still provide only best-effort delivery since they do not guarantee service the other half of the way, to the final destination from the internet exchange point.

IP transit

IP transit is a form by which wholesale internet bandwidth is sold to Internet Service Providers (ISPs) and content providers. Pricing is typically offered on a megabit per second per month basis (Mbit/s/Month) and requires the purchaser to commit to a minimum volume of bandwidth.

Pricing for the bandwidth can be reduced significantly by purchasing larger volumes or extending the contract term. Often burstable billing is used for calculating IP transit charges, which is a method of measuring bandwidth based on peak utilisation.

Modern IP transit agreements typically provide service level guarantees to almost all of the major internet exchange points within a continental geography such as North America.

These service level agreements still provide only best-effort delivery since they do not guarantee service from the internet exchange point to the final destination.