What problems would present themselves if TCP did not allow senders and receivers to negotiate a timeout window? IP is a connectionless protocol, whereas TCP is connection-oriented. How can these two...

What problems would present themselves if TCP did not allow senders and receivers to negotiate a timeout window? IP is a connectionless protocol, whereas TCP is connection-oriented. How can these two protocols coexist in the same protocol stack? What does the acronym SCSI stand for? Does the name still make sense?