State of the art research into current TCP/IP technology, analysis of its limitations, critical investigation of Ipv6 features and potential benefits by its implementation for specific application scenarios such as streaming video in a simulated environment such as OPNET Modeler. OPNET Modeler will provide hard evidence to support the arguments made during research. OPNET Modeler is a highly sophisticated and suitable tool that allows comparison of IPv4 and IPv6 technologies in a totally configurable simulation environment. OPNET Modeler has become the state of the art tool for evaluating network performance. It is used across the world by thousands of experts and has significantly altered the way research is conducted. Other tools do exist, but OPNET Modeler remains fast, reliable and efficient with its user-friendly interface.