HPLC Communication Isolation Technology Based on Communication Signal Isolation Technology to Achieve Communication Network Topology Level

With the rapid development of communication isolation network topology, computer network has penetrated into all fields of society and become the backbone of the information age. Moreover, with the increasing expansion of network scale, network management is facing higher and higher requirements and greater difficulties. As the basis of network management, network topology detection will help network managers better understand the network situation, carry out security prevention and optimization management, which is of great application value and practical significance. Therefore, network topology detection has become one of the research hotspots in the field of computer network. Corresponding to OSI (Open System Interconnection) seven-layer network model, network topology detection can be divided into network layer topology detection and data link layer topology detection. This paper analyzes the basic principle of communication network topology realized by HPLC isolation and the research status of network topology detection at home and abroad, and improves the topology detection methods of communication network layer and link layer respectively. In the aspect of network layer topology detection, this paper proposes a personalized topology detection method using both Simple Network Management Protocol (SNMP) and Internet Control Message Protocol (ICMP) protocols and hierarchical detection strategy. The algorithm adopts a hierarchical detection strategy, which divides the network topology detection into two levels: the first level topology detection uses SNMP to detect the routing devices and subnets in the network; The secondary topology detection uses ICMP protocol to detect the active hosts in the subnet and the type of subnet. Moreover, the hierarchical strategy of the algorithm is similar to the hierarchical structure of the communication network, which can well reflect the hierarchy of the network. In the aspect of data link layer topology detection, by analyzing and comparing the topology detection algorithms based on bridge republication and bridge spanning tree, a comprehensive data link layer topology detection method combining address forwarding table and spanning tree is proposed.