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Question

Difficulty: MediumNetwork Cable Types and Connectors

A network technician is replacing an aging video surveillance line that connects a digital video recorder (DVR) to a camera located 250 meters away. The legacy installation suffered from signal degradation over the long distance. The technician needs to install a heavy-shielded coaxial cable featuring low signal attenuation, terminated with a twist-and-lock connector compatible with the CCTV equipment inputs. Which cable type and connector combination should the technician choose?

  1. RG-6 coaxial cable terminated with BNC connectorsAnswer
  2. B
    RG-59 coaxial cable terminated with F-type connectors
  3. C
    Cat 5e UTP cable terminated with RJ45 connectors
  4. D
    Single-mode fiber cable terminated with LC connectors

Answer

RG-6 coaxial cable terminated with BNC connectors
RG-6 cable provides lower attenuation and superior shielding over extended runs up to several hundred meters. Combined with BNC (Bayonet Neill–Concelman) connectors, which lock securely with a quarter-turn bayonet mechanism, it fulfills both the physical connection and signal integrity requirements for surveillance DVR systems.

Step-by-Step Solution

1
Analyze the transmission medium requirement
Coaxial cabling is required for the analog DVR video interface.
Analog video surveillance equipment relies on coaxial copper transmission.
2
Compare coaxial cable specifications for distance and attenuation
RG-6 has a 18 AWG center conductor providing lower attenuation and better shielding over long runs (250m) compared to RG-59 (20 AWG).
Thicker conductor diameter decreases signal resistance and loss at higher distances.
3
Determine the appropriate connector type for CCTV video ports
BNC (Bayonet Neill–Concelman) connectors feature a push-and-twist bayonet locking mechanism designed for CCTV coaxial connections.
F-type connectors are screw-on/threaded, whereas BNC connectors match standard DVR video input jacks.

Key Concept

Coaxial Cable Standards and Connector Applications
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Topics

Network Cable Types and Connectors

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