[philsnow]

I've always assumed that availability zones would not necessarily be in the same building or even site in a given region, but something I've wondered is what does the network look like between zones?

Does inter-AZ traffic traverse only fiber that you wholly own? Does AWS send traffic over some shared links in some cases? If only some cases, which cases?

[dastbe]

James Hamilton gives a good talk that goes over networking (and more). This is it from reinvent 2014.

https://m.youtube.com/watch?v=JIQETrFC_SQ