Refers to the fact that isps do not charge one another (at the same level) for transferring messages they exchange across an nap or mae. chargebacking peering napping yiping popping

Peering.

Explanation:

Peering :- It is the arrangement of data exchange between Internet service providers (ISP's). Larger Internet service provider (ISP's) also trade data traffic with smaller ISP's so that they can reach smaller region end points.

So we conclude that peering refers to the fact that ISP's do not charge each other for transferring messages across NAP or MAE.

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