3 minute Intro to Peering

Transit $$

Transit $$

ISP A

ISP B

Peering provides routes

only to each

others customers

• Transit costs big bucks.

(But it is a convenient plug in the wall that says

“Internet ? this way”)

2) Peering costs very little and reduces transit costs.

3) Q: Who to peer with and

how to justify costs of peering?

Upstream

Transit

Provider

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