In this time Internet put hand to the bases best efforts and quality of service (QoS) most outside conducting user. But User commercial from Internet take example company, will improve requirement of guarantee of quality of service (QoS) for all their traffic or at parts of selected traffic.
Without existence of improvement and election of quality, service like Internet Telephony and the video that require minimize selected quality of service (QoS) will cannot is possibly executed. Requirement of the quality of service like our desire that everyone can access our webpage swiftly, desire that our internet telephony work by way of having the maximum warranty delay transit. Other requirement take an example you wish to guarantee the existence of priority to traffic mail or other when your network is the network have the big files and user access from FTP. Or you wish to do Broadcast Video (VoD) but this traffic do not want to be disturb by other traffic.
IETF specification of approach (service integrated and separate service) to provide the warranty and election of service quality (QoS) traffic through Internet. Like IPSEC, this approach can also implementation at IPv4, but the implementation at IPv4 product don’t be like when implementation at IPv6 product. Don’t be like IPSEC, implementation QoS to IPv4 will get functions from QoS slimmer compared to the implementation at IPv6. This matter because IPv6 enter the flow lable field accurately permiting flow of traffic distinguishable, which make possibility to identify presisily traffic requiring selected quality of service (QoS).
