Complex sentence: On the other hand, for UDP, NATs do not need to have "port preservation" because applications usually reuse the same UDP socket to send packets to distinct hosts, making port prediction straightforward, as it is the same source port for each packet.
Split into simpler sentences: On the other hand, for UDP, NATs do not need to have "port preservation". This makes port prediction straightforward, as it is the same source port for each packet.