6.5 UDP

Unlike TCP, the User Datagram Protocol (UDP) specifies connectionless datagrams that may be dropped before reaching their targets. In this way, UDP packets are similar to IP packets. UDP is useful when you do not care about maintaining 0% packet loss. UDP is faster than TCP, but less reliable. Unfortunately, UDP packets are much easier for an attacker to spoof than TCP packets, since UDP is a connectionless protocol (i.e., it has no handshaking or sequence numbers ).