Keepalive

A keepalive (KA) is a message sent by one device to another to check that the link between the two is operating, or to prevent this link from being broken.

单词	Keepalive
释义	Keepalive 英语百科 Keepalive A keepalive (KA) is a message sent by one device to another to check that the link between the two is operating, or to prevent this link from being broken.
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