Transit (IP Transit)
Also known as: IP transit, upstream provider
A paid service where a provider carries a customer network's traffic to and from the entire internet.
Transit is the paid relationship that gives a network reachability to everywhere it does not peer directly. A customer buys transit from one or more upstream providers, who announce the customer's prefixes to the rest of the world and carry return traffic back.
A network's set of transit providers is exactly what it declares in an ASPA object, which is what makes AS-path validation possible.
Try it