单选题
The Simple Network Management Protocol (SNMP)is an (71) protocol that facilitates the exchange of management information between (72) . It is part of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite. SNMP enables network (73) to manage network performance, find and sole network problems, and plan for (74) . An SNMP-man-aged network consists of three key components: managed devices, (75) , and network-management systems.