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N10-009 · Question #221

A network administrator needs to connect two network closets that are 492ft (150m) away from each other. Which of the following cable types should the administrator install between the closets?

The correct answer is A. Single-mode fiber. To connect two network closets 150m (492ft) apart, single-mode fiber is the most appropriate cable type due to its ability to support long distances and high bandwidth requirements.

Submitted by kev92· Mar 6, 2026Network implementation

Question

A network administrator needs to connect two network closets that are 492ft (150m) away from each other. Which of the following cable types should the administrator install between the closets?

Options

  • ASingle-mode fiber
  • BCoaxial
  • CDAC
  • DSTP

How the community answered

(46 responses)
  • A
    78% (36)
  • B
    13% (6)
  • C
    2% (1)
  • D
    7% (3)

Why each option

To connect two network closets 150m (492ft) apart, single-mode fiber is the most appropriate cable type due to its ability to support long distances and high bandwidth requirements.

ASingle-mode fiberCorrect

Single-mode fiber is designed for high-bandwidth, long-distance communication, easily supporting distances of 150m and beyond, making it ideal for interconnecting network closets where copper Ethernet cable (limited to 100m) would be insufficient. It also provides excellent immunity to electromagnetic interference.

BCoaxial

Coaxial cable is typically used for older network technologies or cable television, not for modern high-speed inter-closet network links.

CDAC

Direct Attach Cables (DAC) are designed for very short distances, usually within a single rack, typically up to 7 meters, which is far less than 150 meters.

DSTP

Shielded Twisted Pair (STP) copper cables, like Cat5e or Cat6, are limited to a maximum effective distance of 100 meters for high-speed Ethernet, making them unsuitable for a 150-meter run.

Concept tested: Cable types and distance limitations

Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/network-subsystem/ethernet-cabling-standards

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