Exchanging data more efficiently using TCP Fast Open

There is an update to TCP, TCP Fast Open (TFO), that significantly improves overall network latency for short Web transfers. The key component of TFO is the TFO cookie, which is a Message Authentication Code (MAC) tag generated by the server. The client requests a TFO cookie in one regular TCP connection, and then uses it for future TCP connections to exchange data during, instead of after, the three-way handshake, saving up to one full round-trip time (RTT) over standard TCP. TFO support is for MS-MPC and MS-MIC.