J4

The key to CDN is to geographically distribute many proxy servers so taht data can be accessed closed to users

滿足 On-demand streaming✅

利用「Anycast」 : Enable an end user to automatically connect to the closest server out of a defined group of servers ✅

• Anycast delivers a message to any one out of a group of nodes, typically the one nearest to the source using a one-to-one-of-many[1] association where datagrams are routed to any single member of a group of potential receivers that are all identified by the same destination address. The routing algorithm selects the single receiver from the group based on which is the nearest according to some distance or cost measure

利用最靠近user 的 server

Streaming 技術

減少網路延遲

選擇最快的訪問

高可靠性

在線率高、優化效果好

反向代理在現時的網際網路中並不少見，而另一些例子，像是CDN、SNI代理等，是反向代理結合DNS的一類延伸應用。