单选题An optical cable is used to transmit：（）A digital audio from a component to a receiver.B analog video from a component to a receiver.C analog audio from a component to a receiver.D digital video from a component to a receiver.

第1题：

Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）

• A、Dedicated lines for high security data transfer
• B、Data and audio signals that share the same communications infrastructure
• C、Secure access to company extranet
• D、Simple solution for high-quality digital video using coaxial cable

第2题：

Which content network component is primarily used to store and deliver content from the network edge?（）

• A、Content router
• B、Content switch
• C、Content Distribution Manager (CDM)
• D、Content engine

第3题：

第4题：

What is the difference between a CSU/DSU and a modem?（）

• A、A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line
• B、A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line
• C、A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line
• D、A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line

第5题：

Which statement is true？（）  

• A、 A flow layout can be used to position a component that should resize horizontally when the  container is resized.
• B、 A grid layout can be used to position a component tat should maintain a constant size even when  the container is resized.
• C、 A border layout can be used to position component that should maintain a constant size even when  the container is resized.
• D、 The grid bag layout can be used to give a grid-like layout which differs from the normal grid in that individual rows and columns can have unique sizes.
• E、 If two components are placed in the same column of a grid bag layout， and one component resizes horizontally， then the other component must resize horizontally.

第6题：

vPath is a critical component in the VNS architecture. Which two are functions of vPath？（）

• A、 intelligent traffic steering to the VSG
• B、 offloading the processing from the VSG to the VEM
• C、 intelligent traffic steering to the VNMC
• D、 offloading the processing from the VSG to the flow manager
• E、 deep packet inspection

第7题：

Which of the following can cause ghosting in a video image？（）

• A、Bent pin on an S-Video cable
• B、Mislabeled component cables
• C、Defective HDMI cable
• D、Improperly terminated coax cable

第8题：

Which content network component is primarily used to store and deliver content from the network edge?（）

• A、Content switch
• B、Content router
• C、Content engine
• D、Content Distribution Manager (CDM)

第9题：

What is the term that is used to describe the process of converting a signal from digital to analog？（）

• A、 packetization
• B、 quantization
• C、 decoding
• D、 sampling

第10题：

What are two steps that are taken when a router converts a voice signal from analog to digital form？（）

• A、sampling
• B、packetization
• C、quantization
• D、serialization