The current period sees a quick development of new technique, new network devices, which put network security of every organization, company, etc... at risks. The OSI model and TCP/IP model organized class protocols, applications, services, and devices following to different layers and are the right views about network systems. Some NMSs can manage almost all layers of OSI model such as Network Access Protection (NAP) or Network Admission Control (NAC). However, by no means can a company or an organization easily invest a large amount of budget for those systems, which request a cheaper and more complete system. Besides, those systems do not have ability to monitor and manage properly physical information. From practical NMS, there are many faults happen at physical layer and data link layer. Most of them interact with end-user activities such as plug in, plug out cable without permission, arbitrarily change device configurations or install additional equipments. It is difficult for administrator to detect or manage them. This article proposes a solution for physical access and data link monitoring and management purposes.