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What is an edge server / router / device?

Can someone tell me what an Edge Router is and how it works? Examples and analogies are always welcome.

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marked as duplicate by squillman, Cian, Mark Henderson, Sam, splattne Oct 2 '09 at 9:34

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I think this is close enough to be a duplicate. serverfault.com/questions/67484/what-is-an-edge-server –  squillman Oct 1 '09 at 16:06
    
I don't really see enough information on that question regarding edge routers, specifically. –  Xaisoft Oct 1 '09 at 16:16

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up vote 7 down vote accepted

An edge router is simply a router that connects the network you control to a network that you don't. In most cases, it is the router that's connected directly to your internet connection.

This is in opposition to a core router, which is a router that routes between multiple networks that are all under your control.

An edge router is generally a lower-end router, as it tends not to do much beyond pass traffic, and generally to a circuit that has a relatively low bandwidth. Edge routers are sometimes combined with firewalls, NATs, and VPN endpoints, but I'm not really sure you'd still call it an edge router at that point.

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nice summary. +1. –  joeqwerty Oct 1 '09 at 16:25

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