ENet evolved specifically as a UDP networking layer for the

multiplayer first person shooter Cube. Cube necessitated low latency

communcation with data sent out very frequently, so TCP was an

unsuitable choice due to its high latency and stream orientation. UDP,

however, lacks many sometimes necessary features from TCP such as

reliability, sequencing, unrestricted packet sizes, and connection

management. So UDP by itself was not suitable as a network protocol

either. No suitable freely available networking libraries existed at

the time of ENet s creation to fill this niche.