NetEx ( Network Express ) is a communication software package developed by the Real-Time Systems Group in the Department of Computer Science at Texas A&M University. NetEx is a library of communication primitives that enables user applications to participate in delay guaranteed communications. NetEx consists of three main components: user library, Host Traffic Manager (HTM) and Network Traffic Manager (NTM). User library is the interface of NetEx to the end users. HTM is the module responsible for managing and policing traffic at the host. NTM is primarily responsible for connection management of the entire system.