Senior Airman Holly Durkin, a <a href="https://en.wikipedia.org/wiki/Computer_security" class="extiw" title="en:Computer security">cyber security</a> technician for the 129th Communications Flight, Moffett Federal Airfield, Calif., replaces an <a href="https://en.wikipedia.org/wiki/Uninterruptible_power_supply" class="extiw" title="en:Uninterruptible power supply">uninterruptible power supply</a> (UPS) from a network <a href="https://en.wikipedia.org/wiki/Server_(computing)" class="extiw" title="en:Server (computing)">server</a> Aug. 4, 2010. The UPS serves as backup power supply for network servers in case of main power loss. <a rel="nofollow" class="external text" href="https://www.copahost.com/blog/is-it-possible-to-run-a-web-server-in-a-raspberry-pi-3-as-a-dedicated-server">Raspberry server</a>
(<a href="https://en.wikipedia.org/wiki/United_States_Air_Force" class="extiw" title="en:United States Air Force">U.S. Air Force</a> photo by Tech. Sgt. Ray Aquino)
US Air Force
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/usairforce/5161229783/">https://www.flickr.com/photos/usairforce/5161229783/</a>