c9f5b0af95f7c2c33a1163527c8a47f471e0.pdf - Information Technology for People-Centred Development(ITePED 2011 WIDE AREA NETWORK IMPLEMENTATION ISSUES IN

c9f5b0af95f7c2c33a1163527c8a47f471e0.pdf - Information...

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NIGERIA COMPUTER SOCIETY (NCS): 10 TH INTERNATIONAL CONFERENCE JULY 25-29, 2011 WIDE AREA NETWORK IMPLEMENTATION ISSUES IN SMALL AND MEDIUM SCALE ENTERPRISES *S. Orike 1 , and P. Okwoli 2 1 Department of Electrical/Computer Engineering Rivers State University of Science and Technology PMB 5080, Port Harcourt, Nigeria 2 South South Zonal Head, ICT, Bank of Agriculture Olu-Obasanjo Road, Port Harcourt, Nigeria ABSTRACT The paper addresses the implementation issues of wide area network (WAN) in small and medium scale enterprises (SMSE). Networked computers play great role in the daily operations and activities of mankind in the areas of e- education, e-businesses e-banking, e-healthcare, etc, both in government, public and private enterprises. The work explains the most important role that computer networks, specifically the WAN play in the daily operations of SMSE environment. Today’s computer hardware and software produc tion are ideal for web transactions because it is being designed to allow huge numbers of user applications rapidly and simultaneously access the same data without interfering with each other. The study examines the basic technology behind WAN implementation, and use of virtual private network (VPN) technology to implement a WAN that connects the Head Office of an SMSE to the Branch Offices. It concludes with analysis of findings and recommendations. 1. Keywords: Information technology, SMSE, VPN, WAN 1.0 INTRODUCTION A Wide Area Network (WAN) is a computer network covering multiple distance areas and multiple smaller networks, such as local area networks (LANs) or Metro Area Networks (MANs). The world’s most popular WAN is the internet [1]. The key difference between WAN and a LAN/MAN is scalability [2], hence, WAN must be able to grow as needed to cover multiple cities, even countries and continents. WAN may be privately owned or rented from a service provider. A set of switches and routers are interconnected to form a WAN, using both packet switching and circuit switching technologies. Packet switching allows users to share common carrier resources so that the carrier can make more efficient use of its infrastructure. In a packet switching set-up, networ ks have connections into the carrier’s network, and many customers share the carrier’s network. The carrier can then create virtual circuits between customers’ sites by which packets of data are delivered from one to the other through the network. Circuit switching on the other hand allows data connections to be established when needed and then terminated when communication is complete. A good example of circuit switching is Integrated Services Digital Network (ISDN). When a router has data for a remote site, the switched circuit is initiated with the circuit number of the remote network. Virtual private network (VPN) is a technology widely used in a public switched network to Information Technology for People-Centred Development (ITePED 2011)
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