Appendix A. Understanding SNMPA-2 TSU 120 User Manual 61202052L1-1MIBThis is an index to the organized data within a network device.It defines the operating parameters that can be controlled ormonitored. When requesting the network manager to retrieveor modify a particular piece of information about a networkdevice, the network manager transmits the request to that net-work device. The agent in that device interprets the incomingrequest, performs the requested task, and sends its response tothe network manager. The network manager collects all thedata from the various network devices and presents it in a con-sistent form.CommandsUsing SNMP Version 1, the network manager can issue threetypes of commands: GetRequest, GetNextRequest, andSetRequest.GetRequestThis command retrieves a single item or the first in a seriesfrom a network device.GetNextRequestThis command retrieves the next item in a series from a net-work device.SetRequestThis command writes information to a network device.MessagesThe network device issues two types of messages:GetResponse and Trap.GetResponseThis message is the response to a network managerGetRequest or GetNextRequest command.
