Jumat, 09 Oktober 2009

router network

router network
router

Routers connect two or more logical subnets, which do not necessarily map one-to-one to the physical interfaces of the router. If you were really mean you could even go and block the person from being able to access their own router, and if that person was smart enough they would just use the reset button typically located on the back of the unit. Where’s the problem though? If the person doesn’t realize that they should be using any kind of wireless security or know to change the default password, then they will probably not notice that they can reset the router to see if that works. A router uses a routing table to decide where the packet should be sent so if the router cant find the preferred address then it will look down the routing table and decide which is the next best address to send it to.

Routers operate in two different planes
Control panel, in which the router learns the outgoing interface that is most appropriate for forwarding specific packets to specific destinations, Forwarding plane, which is responsible for the actual process of sending a packet received on a logical interface to an outbound logical interface. Edge Router: Placed at the edge of an ISP network, it speaks external BGP (eBGP) to a BGP, Subscriber Edge Router: Located at the edge of the subscriber's network, nter-provider Border Router: Interconnecting ISPs, this is a BGP speaking router that maintains BGP sessions with other BGP speaking routers.

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