  Data centers (DCs) nowadays house tens of thousands of servers and switches,
interconnected by high-speed communication links. With the rapid growth of
cloud DCs, in both size and number, tremendous efforts have been undertaken to
efficiently design the network and manage the traffic within these DCs.
However, little effort has been made toward measuring, understanding and
chattelizing how the network-level traffic of these DCs behave. In this paper,
we aim to present a systematic taxonomy and survey of these DC studies.
Specifically, our survey first decomposes DC network traffic behavior into two
main stages, namely (1) data collection methodologies and (2) research
findings, and then classifies and discusses the recent research studies in each
stage. Finally, the survey highlights few research challenges related to DC
network traffic that require further research investigation.

Networking and Internet Architecture