Answer Description
The Simple Network Management Protocol (SNMP) is used to manage devices on IP networks. It is used to monitor, configure, and manage network devices. SNMPv3 is the correct answer because it provides authentication, integrity, and confidentiality while version 1 and 2 did not.
Wikipedia
Simple Network Management Protocol (SNMP) is an Internet Standard protocol for collecting and organizing information about managed devices on IP networks and for modifying that information to change device behavior Devices that typically support SNMP include cable modems, routers, switches, servers, workstations, printers, and moreSNMP is widely used in network management for network monitoring SNMP exposes management data in the form of variables on the managed systems organized in a management information base (MIB) which describe the system status and configuration These variables can then be remotely queried (and, in some circumstances, manipulated) by managing applications Three significant versions of SNMP have been developed and deployed
Simple Network Management Protocol - Wikipedia, the free encyclopedia