Basics of internet network structure.

Any computer network faces a tradeoff. Adding more links creates more capacity and makes the network more robust, since packets can be routed around link failures. However, links are infrastructure and therefore expensive. The internet strikes a balance between the extremes of a fully-connected (and absurdly expensive) network and a minimally-connected (but fragile) network. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bu

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