SNMP is a communication protocol between the management process (NMS) and the agent process (Agent). It specifies a standardized management framework for monitoring and managing devices in a network environment, a common language for communication, and corresponding security and access control mechanisms. Using the SNMP function, network administrators can query device information, modify device parameter values, monitor device status, automatically discover network faults, and generate reports. SNMP has the following technical advantages: Based on the standard protocol of TCP/IP Internet, the transport layer protocol generally adopts UDP. Automate network management. Network administrators can use the SNMP platform to retrieve information, modify information, discover faults, complete fault diagnosis, perform capacity planning, and generate reports on nodes on the network. Shield the physical differences of different devices and realize the automatic management of products from different manufacturers. SNMP only provides the most basic set of functions, which makes the management tasks relatively independent from the physical characteristics of the managed devices and the actual network type, so as to realize the management of devices from different manufacturers. The combination of simple request-response mode and active notification mode, and a timeout and retransmission mechanism. There are few message types, the message format is simple, easy to analyze, and easy to implement. The SNMPv3 version provides authentication and encryption security mechanisms, as well as user- and view-based access control functions, enhancing security.
