![]() SNMP trap: SNMP traps are agent messages sent without prompts from the manager station.These response packages contain either the requested data, a confirmation of the adjustments, or an error message if the requests could not be answered correctly. GET response: If the manager has requested one or more data records or initiated changes or actions, the agent responds with GET responses.An example situation in which several adjustments are necessary is configuring an IP address, which also requires the specification of a network mask at the same time. ![]() SET request: SET requests allow the manager to change one or more data records of the intended network device or to trigger certain actions.Such a request is comparable to several successive GETNEXT requests. GETBULK request: If a defined number of data records are to be retrieved with a single request, the manager application can send a GETBULK request (from SNMPv2).GETNEXT request: This message format is required if subsequent data records need to be queried, e.g.GET request: GET requests are the default messages for retrieving a specific record on the intended network device.The SNMP protocol specifies seven possible message types for communication between manager and agent: These kinds of agent applications are already in use by default in most popular Windows and Linux systems, for example in the form of the snmpd daemon (Linux only). You enter the relevant data on the target host and pass it on to the management station, but you can also make settings yourself and trigger certain actions. The agents, which are also applications, are the counterpart on the side of the individual network components. For this purpose, management software is installed that enables SNMP data retrieval and the initiation of certain actions. The central management station is the system from which the administrator monitors and controls the various network participants. Network management via SNMP is based on an agent manager model.
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