Networks

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.

Check out this site for some links to good info; http://compnetworking.about.com/compute/compnetworking/cs/protocols/index.htm

Hope that helps you.

This question was closed by the author