Model of the Different Heterogeneous Networked Database Systems at the Medium and Large Companies in Kosovo

Modern companies use Local and Regional Networks, as well as the Internet, for everyday Business. With the latest developments in the region, this has become relatively easy, since companies have a full support to develop the IS by the ISP in a manner of: Centralized (Hierarchical) IS; Decentralized (Distributed) IS or Combined (both hierarchical and distributed) IS. Since the company branches and hence its resources lay within one single state, the network is usually provided by the same ISP. This means that the offer includes Internet, DNS, E-mail service, Intranet and VPN. Now, most of the services provided are designed to be used all over the WWW and the offer itself consists of very ingenious solutions. The development of applications for Internet / Intranet seeks to overcome the limitations of Web forms interface. The nature of work of Companies distributed around a state requires a combination of various types of communication means as: Wired Networks; Wireless Networks; Meshing Networks; GPRS Networks. In the case of bigger trading Companies, the number of processes that has to be managed, as well as very large number of various items-codes, in combination with the need to serve immediately, makes VPN Networks more attractive. VPN makes possible the use of: Local Data Servers; Local Application Servers; Distant Central Data Servers; Combination of Wire Networks with Wireless and GPRS Networks. The expansion of the business in other neighboring countries complicates the communication between branches and central. The need for immediate information stays the same, but, since we usually have more than one different ISP, the solutions becomes a little more complicated. This paper offers the original solution how the communication between branches has to be done using Bridges and VPN tunnels between the networks of two different ISP-s