单选题When installing a security system, which of the following connectors would be used to connect the security system to the telephone service demarcation?()A
RJ-31xB
RJ-11C
RS-232D
DB-9
题目
单选题
When installing a security system, which of the following connectors would be used to connect the security system to the telephone service demarcation?()
A
RJ-31x
B
RJ-11
C
RS-232
D
DB-9
更多“单选题When installing a security system, which of the following connectors would be used to connect the security system to the telephone service demarcation?()A
RJ-31xB
RJ-11C
RS-232D
DB-9”相关问题