What is the difference between BGP and OSPF?
I want to setup a dynamic routing network， I want to know, What is the difference between BGP and OSPF ? Does both two need to be used together commonly ?
Based on your question, I'm guessing that you are new to networking and just require a high-level answer.
To oversimplify:
- BGP (Border Gateway Protocol) is used at the edge of your network to connect your network to the Internet
- OSPF (Open Shortest Path First) is used internally inside your network
At the edge of your network, you would use routers to map BGP to OSPF and vice-versa.
Routing is not a simple topic - you should plan to spend a lot of time studying and designing your solution. There are also other protocols available such as RIP, IS-IS and IGRP which may be more suitable for your requirements.