The company have some problems with connection branches by LAN network and the cost of communication between employees in branches. When company establish branches, it was so hard to share their resource with other branches such as hard disk drives, DVD drives. Since data is stored on a local server, it can be guaranteed to be secure. If the data on the server is updated, then simply all the LAN users can access them. Since all the data of the connected computers are stored inside a central server, unauthorized users can view all the browsing history and downloads of all the connected computers it is a pig issue.