Those labels of network flows have been gaining currency in the industry. Here's an example diagram: http://www.theregister.co.uk/2011/08/15/xsigo_private_vir

Those labels of network flows have been gaining currency in the industry. Here's an example diagram: http://www.theregister.co.uk/2011/08/15/xsigo_private_virtual_interconnect/ http://www.theregister.co.uk/2011/08/15/xsigo_private_virtua... Also see "north-south" and "east-west" in sub-heading "Changing traffic patterns": http://en.wikipedia.org/wiki/Software-defined_networking#The_need_for_a_new_network_architecture http://en.wikipedia.org/wiki/Software-defined_networking#The... Amazon's AWS presentations also sometimes mention network traffic inside the datacenter in terms of “east-west traffic” & “north-south”. http://www.enterprisetech.com/2014/11/14/rare-peek-massive-scale-aws/ http://www.enterprisetech.com/2014/11/14/rare-peek-massive-s...