A customer has asked for the ability to operate dual digital

第1题：

第2题：

第3题：

第4题：

Which two statements are true about broadband cable （HFC） systems？（）

• A、Cable modems only operate at Layer 1 of the OSI model.
• B、Cable modems operate at Layers 1 and 2 of the OSI model.
• C、Cable modems operate at Layers 1， 2， and 3 of the OSI model.
• D、A function of the cable modem termination system （CMTS） is to convert the modulated signal from the cable modem into a digital signal.
• E、A function of the cable modem termination system is to convert the digital data stream from the end user host into a modulated RF signal for transmission onto the cable system.

第5题：

What does DVI stand for?（）

• A、Dual Visual Interface
• B、Display Vertical Interface
• C、Digital Visual Interface
• D、Digital Vision Interchange

第6题：

第7题：

In Which of these phases are a customer’s business requirements identified and documented？（）

• A、plan
• B、design
• C、prepare
• D、operate

第8题：

第9题：

A customer reports the optical drive is no longer responding. Which of the following questionsshould be asked FIRST?（）

• A、“Did you log in with an administrator account?”
• B、“Have you been to any inappropriate websites?”
• C、“What have you changed since the optical drive worked properly?”
• D、“What has changed since the optical drive worked properly?”

第10题：

At a certain customer’s site， a NAS is logically in the traffic path but not physically in the trafficpath. The NAS identifies clients by their IP addresses. In which access mode has this NAS beenconfigured to operate？（）

• A、 Layer 2 Edge mode
• B、 Layer 2 Central mode
• C、 Layer 2 In-Band mode
• D、 Layer 3 mode