Due to increasing developments in large (gigabit) application programs, very large scale integration (VSLI) technology, high speed transmission media, high speed data networks, and others, researchers question the ability of most existing transport protocols to handle enormous amounts of data efficiently. Applications such as video conferencing, distributed processing, and real-time imaging requires protocols and networks that are capable of providing large bandwidths and low delays. Transport and network mechanisms implemented in VSLI allow a substantial amount of protocol processing to be performed in hardware. Several performance criteria are placed on existing transport protocols to meet the needs of gigabit applications. This paper compares the different transport protocols, such as Delta-t, Network Block Transfer (NETBLT), Transport Protocol Class 4 (TP4), Transmission Control Protocol (TCP), and Versatile Message Transaction Protocol (VMTP), in terms of the following transport services: connection management, data transfer, and flow and error control.