TWAMP is an open protocol defined in RFC 5357 which is used to measure the network performance between two devices that support the TWAMP protocol. It utilizes two protocols, TWAMP-Control and TWAMP-Test. In addition, there are two variants, TWAMP and TWAMP Light. The TWAMP control and reflector entities involved exchange packets as part of a session. Reflected packets are timestamped, enabling performance of the network to be measured.