Comparison Between Lan and Wan

Topics: Computer network, Local area network, IP address Pages: 9 (3084 words) Published: July 29, 2012
A local area network (LAN) is a network of computers that interconnects computers in a limited or a small area such as a home, computer lab, school, or office building using the network media. The defining characteristics of LANs, is in contrast to the wide area networks (WANs), including their higher data-transfer rates, smaller geographic area, and lack of a need for leased telecommunication lines. ARCNET, Token Ring and other technology standards have been used in the past, but Ethernet over twisted pair cabling, and Wi-Fi are the two most common technologies currently used to build LANs. The increasing demand and use of computers in universities and research labs in the late 1960s generated the need to provide high-speed interconnections between computer systems. A 1970 report from the Lawrence Radiation Laboratory detailing the growth of their "Octopus" network gave a good indication of the situation. Cambridge Ring was developed at Cambridge University in 1974 but was never developed into a successful commercial product. Ethernet was developed at Xerox PARC in 1973–1975, and filed as U.S. Patent 4,063,220. In 1976, after the system was deployed at PARC, Metcalfe and Boggs published a seminal paper, "Ethernet: Distributed Packet-Switching for Local Computer Networks." ARCNET was developed by Data point Corporation in 1976 and announced in 1977. It had the first commercial installation in December 1977 at Chase Manhattan Bank in New York. Whereas a WAN is A Wide Area Network (WAN) is a telecommunication network that covers a broad area (i.e., any network that links across metropolitan, regional, or national boundaries). Business and government entities utilize WANs to relay data among employees, clients, buyers, and suppliers from various geographical locations. In essence this mode of telecommunication allows a business to effectively carry out its daily function regardless of location. This is in contrast with personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively.

Integrating wireless LAN/WAN is in the mainstream of future wireless networks. As being the first telecommunication-services evolving from voice services delivered via the wire-line terminals, to cordless phones, to cellular phones, wireless data tele-services similarly evolve with network deployment. We have been already witnessing voice services evolving to transform universal basic data services such as a Cellular Digital Packet Data. Once the basic data services become, they are ultimately required to move towards a higher rate data services, and then evolve around bandwidth on demand. Another idea on network evolution is the cordless phone, which changed into the Japanese PHS system offering high data bit rate and greater mobility. Template by this history of network progression, we highly appreciate the evolution and combining of wireless LANs and wireless WANs into an integrated networking services/devices. To understand this vision, we have been developing a Full Stack Adaptation (FSA) concept. It is based on the architecture that integrates horizontal and vertical handoff, while allowing applications to fully take part in the process of handoff. In this article, we focus on mating the Mobile IP into the FSA architecture. We first present to you the FSA architecture and then the present ideas and experiments on how to impose Mobile IP on with Wireless LANs, as a step towards a full merger of wireless LAN/WAN. We implemented and experimented an evaluation of a Subnet Architecture on top of wireless LAN cells, using the Mobile IP. We describe the SA architecture and present experimental results of the demonstration in its feasibility in an actual implementing IEEE 802.11 Wireless LANs and Mobile IP. As long as no single wireless...
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