As the market for high speed Internet and cellular communication services reaches maturity, communication services have shown a limit to growth based on the number of subscribers. Next Generation Networks services based on IP Routing form the beginning of a new age of innovative and affordable services where consumers will witness substantial new service offerings and also savings in their consumption bills for such services. The requirement of these applications challenges the limitations of the network technologies that are in place today. Next Generation Networks are based on internet technologies including Internet Protocol (IP) and Multi-protocol Label Switching (MPLS). The thesis therefore presents an overview of the converged IP Network services, focusing on opportunities for service differentiation and introducing current service oriented technology to meet up the demands of consumers. These technologies allow service providers to build and operate networks that can be able to provide local, long distance, global, mobile, data, voice and internet services to consumers. In meeting the demands of these newer services to its customers adequately with high Quality of Service (QoS), Speed, Traffic Engineering and Scalability, Internet Service Providers have engaged Next Generation Networks using the more reliable Multi-Protocol Label Switching in the core of their networks while also delivering such services through a secure means over the public internet by using Virtual Private Networks.