Which of the following is a common technology for visual monitoring?

Question

Options

• AClosed circuit television
• BOpen circuit television
• CBlocked video
• DLocal video

• A
  76% (19)
• B
  12% (3)
• C
  8% (2)
• D
  4% (1)

Explanation

Closed Circuit Television (CCTV) is the standard technology for visual monitoring because it transmits video signals over a closed, private network to specific monitors or recording devices - making it widely used in security systems for surveillance of buildings, facilities, and public spaces.

Option B ("Open circuit television") is incorrect because "open circuit" implies an uncontrolled broadcast signal, not a dedicated monitoring system - no such standard technology exists under that name. Option C ("Blocked video") is a fabricated term with no meaning in security or surveillance technology. Option D ("Local video") is not a recognized technology category; while CCTV is often local, the term itself isn't used to describe a monitoring system.

Memory tip: Think of the "C" in CCTV as "Controlled" - the signal goes only to designated screens, keeping the feed private and secure, which is exactly what a monitoring system needs.

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