Is TCP Keepalive the only mechanism to determine a broken link?

Question

I recently ran into a issue where intermediate link betweeen a TCP server and client was down. The client has the requirement of connecting to a secondary server if the prim

Answer 1

You could invent and implement your own keep-alive using TCP's Out-Of-Band feature, but I wouldn't even consider that unless you have some significant issue with the one that's already built for you.