HT0-201

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

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