keep + alive
"keepalive." YourDictionary, n.d. Web. 07 December 2018. <https://www.yourdictionary.com/keepalive>.
keepalive. (n.d.). Retrieved December 07th, 2018, from https://www.yourdictionary.com/keepalive
In a communications session, a keepalive is a signal sent from one device to another in order to maintain the session or to determine if the line is down.
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