I have a external cisco router, and have DSL, whenever I have a problem, they ask me if i am in bridging or ppp mode. What is the diffrence and can you recommend a website that can help me understand this type of networking?
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A bridge acts like a repeater but it can also filter packets. Only packets addressed to a machine on the other side of a bridge will be allowed through however, this doesn't stop broadcast messages.
PPP is more of a direct connection, hence the name (Point to Point Protocol). This is the way people with modems connect to an ISP. A LAN can use PPP connections in their router to provide internet access to an entire network.
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cisco routing bridging ppp