Management Information Base (MIB)

The managers issue GetRequest, GetNextRequest, and SetRequest messages to port# 161 which the agents should reply with GetResponse message to the same port. The managers listen to the port 162 in case there is a Trap message issued by the agents due to changes in Management Information Base (MIB) and underlying node.

#SNMPv3, defined by RFC 2570 - 2575, addresses security issues of #SNMPv1 1988 and #SNMPv2 1993 by using User Security Model (USM), including overall architecture and security capability. It provides authentication service# that is part of User-Based Security (UBS), privacy# (Data Encryption Standard (DES) message encryption), and Access Control# to allowed operations, device information, and Management Information Base (MIB) access.

SNMP supports both central and distributed management (multiple Management Station or Manager with a pool of Management Agent) as each device in the network maintains local Management Information Base (MIB). The communication is usually done in User Datagram Protocol (UDP)# but SNMPv2 allows the use of Transmission Control Protocol (TCP)# too.

#SNMPv1 is defined by RFC 1065 - 1067 which specify as a protocol supporting stand-alone Management Station or Manager and Management Agent. Limited but easily implemented Management Information Base (MIB) of scalar variables and two dimensional tables are defined. It is designed to be a streamlined (simple but efficient) protocol with limited functionality such as allows only centralised network management. The connection between the manager and agent is done using User Datagram Protocol (UDP)#.

NMS is a set of #hardware and/or #software tools that allows administration of individual components of a network within a larger Network Management# framework. It consists of Management Station or Manager#, Management Agent#, Management Information Base (MIB)#, and Network Management Protocol#. These components assist in Network Device# discovery, network device monitoring, network performance analysis, and intelligent notifications.

Management Station is a stand-alone system or part of the #shared system providing interface for human network manager which includes set of Network Management# applications such as data analysis and fault recovery. It is an interface to monitor and control network. It is responsible for translating manager’s requirements into monitoring and control of remote elements and extracting network management information from Management Agent.

Management Agent is a Network Device# equipped with agent software from #Network Management System (NMS) which allow remote management from the Management Station or Manager. In addition of requiring to respond to requests for information and/or action, it asynchronously and voluntarily sends the manager its information.