TCP/IP Internet Standard Management Framework and SNMP Versions (SNMPv1, SNMPv2 Variants, SNMPv3)
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I would imagine that at some point, everyone realized that the situation was a mess, and decided enough is enough. In 1996 work began on a new approach to resolve the outstanding issues and return universality to SNMP. In 1998, SNMP version 3 (SNMPv3) was developed, which includes additional enhancements to SNMP and finally gets all the players back on the same team.
SNMPv3 is the most current version of SNMP and is still being actively revised. One of the important changes in SNMPv3 is a more formalized way of handing different security approaches to SNMPobviously, a lesson learned from the SNMPv2 experience.
SNMPv3 uses SNMPv2 protocol operations and its PDU message format, and the SMIv2 standard from SNMPv2 as well. SNMPv3 allows a number of different security methods to be incorporated into its architecture, and includes standards describing user-based security as defined in SNMPv2u and SNMPv2* as well as a new view-based access control model. It also includes additional tools to aid in the administration of SNMP.
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