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Advanced Infrastructure Penetration Testing by Chiheb Chebbi

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Routing fundamentals

In the previous chapters, we discussed switches. Routers and switches are both required to forward information. Switches work in layer 2 even if there are some layer 3 switches. Routers operate in layer 3, which is the Network Layer:

In order to exchange information, routers use IP addresses. They are maintaining  a routing table. When it comes to routing, we have two different categories:

  • Static routing: In static routing, all the routes are set manually by the network administrator. It is a good decision for small networks where we have fewer unnecessary routing updates, but it will be a problem when a link goes down. ...

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