Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. The protocol is classified as a path vector protocol. The Border Gateway Protocol makes routing decisions based on paths, network policies, or rule-sets configured by a network administrator and is involved in making core routing decisions.
BGP 的工作原理：
然后什么是 BGP Hijack 呢？
以及如何在 BGP 中间防御 DDoS：
一门非常好的全系列 BGP 课程（100多个小视频），但是确实很好～
然后如果你想自己弄一个简单的BGP，可以参考这个
