648-238 exam study materials

Our 648-238 exam study materials Cisco technical experts to collate and repeated verification, complete coverage of all exam questions.

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Question 1

What are the two differences between interlaced and frogressive scan video?(Choose two.)

A. Progressive scan video is generally better with fast-moving objects
B. Interlaced video is generally better with fast-moving objects
C. Interlaced video is constructed out of alternationg odd and even lines
D. Progressive scan video is constructed out of alternating odd and even lines

Answer: AC


Question 2

Where should outdoor surveillance cameras be mounted when nearby sources of light are present?

A. The camera should be mounted lower than the light source.
B. The camera should be mounted in parallel with the nearest light source.
C. The camera should be mounted above the light source.
D. Location does not matter, as long as the camera is daynight capable.

Answer: A


Question 3

What is the correct camera and lens setup for the use of IR lighting?

A. Color camera with IR corrected lens
B. A camera with daynight mode and IR corrected lens
C. A camera with daynight mode and varifocal lens
D. Color camera with varifocal lens

Answer: B