New service from the telephone company is delivered over fiber, but the technician does not have a fiber module for the router. Which of the following would remedy this issue?（）
A、OTDR
B、Media converter
C、CSU/DSU
D、Fiber repeater
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Which CLI command displays error statistics for an interface in real-time?（）
A、monitor traffic
B、show interfaces
C、monitor interface
D、show interfaces extensive
要求利用所提供的室内接地件将馈线接头与母地线相连，连接点牢固，并作绝缘处理，地线应穿出地线U型卡（）左右，以保证接触良好。
A、2mm
B、5mm
C、4mm
D、1mm
What is used to view status messages sent to a file named "test" as they are sent?（）
A、monitor start test
B、show log test
C、view log test
D、show test realtime
光纤直放站设备与无线直放站设备通信原理一样。
A、对
B、错
A user receives an email slating that their account was compromised and there is a need to verify account credentials by submitting the correct information on a website. Which of the following security threats is occurring?（）
A、Phishing
B、Smurf attack
C、Denial of service
D、Man-in-the-middle
