Sure it does. SSH to a remote host, do nothing, then disconnect the cable connected to your router's uplink. SSH (for example) won't notice as long as you do no

Sure it does. SSH to a remote host, do nothing, then disconnect the cable connected to your router's uplink. SSH (for example) won't notice as long as you do nothing in your SSH session. On some connections where I have SSH keepalives disabled, I can suspend my laptop, go for a drive around town with it, come home, resume, and still have my session connected.