IP Transit Explained: What's Behind Your Internet Uplink?

IP Transit is the service that connects your network to the entire rest of the internet. A carrier with its own Autonomous System (AS51202 in our case) announces your IP prefixes via BGP to all other networks and carries your traffic to every reachable destination - and back.

Transit vs. peering

Two paths carry data onto the internet. With peering, two networks exchange their traffic directly and usually for free - ideal for destinations within those networks. Transit, by contrast, is the paid full-reach uplink: you reach every destination, even where you have no peering of your own. A good transit provider combines both - many direct peerings for low latency plus full transit reach.

The 95/5 billing method explained

At AS51202, the commit is the monthly minimum purchase. For 95th-percentile billing, throughput is sampled every five minutes; the highest 5% of samples are discarded at month end. The next value is the 95th percentile. The proposal defines excess usage rates and how traffic directions are evaluated.

Why RPKI and full IPv6 are essential

RPKI (Resource Public Key Infrastructure) makes it cryptographically verifiable which AS may announce which prefixes. This allows many origin hijacks and mis-announcements to be detected and rejected by routing policy - an increasingly expected security standard. Equally important is real dual-stack: full IPv4 and IPv6 support keeps your services reachable for every user.

DDoS-protected transit

Classic transit delivers pure connectivity. DDoS-protected transit integrates attack defence directly into the uplink: detection and mitigation run in the carrier network, so volumetric attacks are filtered before they reach your port. You save yourself a separate scrubbing solution.

Conclusion

Good IP Transit is more than a line: redundant hardware, fair billing, security standards like RPKI and integrated DDoS protection make the difference between "online" and "reliably online".