In other words, the invention of cheap LAN triggers expansion of the network and its success. Such proliferation is based on the availability of the Ethernet at a reasonable price. The Internet, the most successful computer network, has been proliferated by interconnecting a number of. But the cost of high speed multimedia communications is estimated so high with current technology. View projectĬurrently, the emergence of high speed networks such as IEEE 802.6, ITU-T SG 13 B-ISDN and the ATM Forum's network stimulates steadily increasing demand for multimedia communications. The adder has only two levels of prefix computation which is independent of input bit width and results in a regular structure without increasing the fan-out problems, This reduction leads to appreciable decrease in static power consumption, which enhances the performance of processors fabricated in deep submicron. The expressions for final carry signals are similar to Ling’s equation and therefore Ling’s prefix network has been adopted for final carry generation. The mathematical expressions for pseudo and final carry signals are formulated for the proposed hybrid adder. This is considered an important design aspect for the processors in deep submicron (VLSI) technology. this adder also exhibits appreciable decrease in logic gates in the critical path, leading to a reduction in static power consumption. Hybrid adder architecture that pre computes the pseudo carry Signals by exploiting the symmetry of 3X multiple and the final carry generation by Ling prefix network the adder in the carry path redu ces the complexity, the proposed tested in significant Improvement in the power delay product (~25-55%) compared to state of the art adders for 64 bits. It offers guaranteed network access for voice and video applications because the throughput rate in the ATM LANE for different multimedia communication messages is high with hundreds of Mbps. It enables users to acquire the desired level and quality of service because the transmission time delay using ATM technology is very limited 2. The paper has achieved the following important conclusions from internetworking with ATM technology: 1. ATM technology will allow core network stability while allowing service interfaces and other equipment to evolve rapidly. Carriers can no longer afford to go through the financial burden and time required to deploy a separate network for each new service requirement (e.g., dedicating a network for a single service such as transparent LAN or frame relay). ATM reduces infrastructure costs through efficient bandwidth management, operational simplicity, and the consolidation of overlay networks. Asynchronous transfer mode (ATM) is a cell-oriented switching and multiplexing technology that utilizes fixed-length packets to carry different types of traffic and also ATM will enable carriers to capitalize on a number of revenue opportunities through multiple ATM classes of services high- speed local-area network (LAN) interconnection voice, video, and future multimedia applications in business markets in the short term and in community and residential markets in the longer term. The work presents principles of operation, protocols and internetworking with ATM technology. This paper is concerned with designing and simulation of computer networks based on Asynchronous Transfer Mode (ATM) Technology which is with a high-performance cell-oriented switching technology that utilizes fixed small size packets to carry different types of traffic.