I am debugging a session of streaming of Facebook Live and I have an url of .m4v type which source is https://video-mad1-1.xx.fbcdn.net. With other connection in other place I have this url: https://video.fagp1-1.fna.fbcdn.net.
why do I have different urls for the same content?
It could be depend of the connection or the place (the distance between the two places are around 2 kilometers)?
答案 0 :(得分：0)
内容分发网络（CDN）遍布整个服务器，以帮助尽可能接近用户地提供内容。这样可以减少延迟，通常可以提高吞吐量，并可以减少通过更长距离的链路传输的流量，而这些链路通常会更加限制其可用带宽。
当您将内容放入CDN节点时，通常会将其分发到至少其他一些地方。因此，完全有可能为相同的内容使用不同的URL。
您可能还会发现以下有趣的内容：https://anuragbhatia.com/2018/03/networking/isp-column/mapping-facebooks-fna-cdn-nodes-across-the-world/