Construction of Distributed Terminal Management System in Consideration of Hierarchical Subnet in Intranet

With the spread of internet, enterprises and research institutions which introduced network have rapidly increased in number and have begun construction of intranet networks. Inside an intranet, a user terminal that might be maintained and even carried individually by the user is often connected. For that reason, problems such as computer virus infections and information leakage, which might occur when using file exchange software, are becoming more serious than ever. However, network management technology is slow in innovation, and operational management is still done with old technique on the basis of administrators´ individual experiences. We have built a terminal management system that simplifies network management tasks and prevents inappropriate connections of terminals to the network. This system is allocated to every subnet and manages users and terminals there. It has capability to give permission for use of the network when a terminal that has been registered to another subnet is moved to a different subnet temporarily. The experiment and evaluation is carried out to confirm the system usability and performance.