Editing Data center (section)

==Network infrastructure==
[[File:NetworkOperations.jpg|thumb|An operation engineer overseeing a network operations control room of a data center (2006)]]
[[File:Eqiadwmf 9046.jpg|thumb|left|upright|An example of network infrastructure of a data center]]

Communications in data centers today are most often based on [[Computer network|networks]] running the [[Internet protocol suite]]. Data centers contain a set of [[Router (computing)|routers]] and [[Network switch|switches]] that transport traffic between the servers and to the outside world<ref>{{cite journal |author1=Mohammad Noormohammadpour |author2=Cauligi Raghavendra |title=Datacenter Traffic Control: Understanding Techniques and Tradeoffs |journal=IEEE Communications Surveys & Tutorials |date=July 16, 2018 |volume=20 |issue=2 |pages=1492–1525 |doi=10.1109/comst.2017.2782753 |arxiv=1712.03530 |s2cid=28143006 }}</ref> which are connected according to the [[data center network architectures|data center network architecture]]. [[Redundancy (engineering)|Redundancy]] of the internet connection is often provided by using two or more upstream service providers (see [[Multihoming]]).

Some of the servers at the data center are used for running the basic internet and [[intranet]] services needed by internal users in the organization, e.g., e-mail servers, [[proxy server]]s, and [[Domain Name System|DNS]] servers.

Network security elements are also usually deployed: [[firewall (networking)|firewalls]], [[VPN]] [[Gateway (computer networking)|gateways]], [[intrusion detection system]]s, and so on. Also common are monitoring systems for the network and some of the applications. Additional off-site monitoring systems are also typical, in case of a failure of communications inside the data center.