问题
单项选择题
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
The key to SNMP (76) is its simplicity. It has a small command set that does a good job of collecting information from (77) any network device. In a SNMP environment, (78) of the work is handled by the network management system. Devices that are being managed are not (79) with processing (80) that might affect their performance.
（79）是（）
A.time
B.power
C.speed
D.overhead
答案
参考答案：D
解析：
每个空有四个选项，选择最适合的答案
SNMP(76)的关键是简易。有一小组指令来做从(77)任何网络设备收集信息的大部分工作。在一个SNMP环境中，有(78)工作是由网络管理系统来解决的。被管理的设备不会(79)可能影响性能的处理(80)。