IMMEDIATE READY IMPLEMENTATION OF VIRTUALLY CONGESTION FREE GUARANTEED SERVICE CAPABLE NETWORK : NEXTGENTCP/FTP/UDP INTERMEDIATE BUFFER CYCLICAL SACK RE-USE

Various increment deployable TCP Friendly techniques of direct simple source code modifications to TCP/FTP/UDP based protocol stacks & other susceptible protocols, or other related network's switches/routers configurations, are presented for immediate ready implementations over proprietary LAN/WAN/external Internet of virtually congestion free guaranteed service capable network, without requiring use of existing QoS/MPLS techniques nor requiring any of the switches/routers softwares within the network to be modified or contribute to achieving the end-to-end performance results nor requiring provision of unlimited bandwidths at each and every inter-node links within the network.