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SG0-001 · Question #444

An administrator has built two storage arrays for a BCDR solution. Each array is in a different datacenter and each datacenter has its own SAN. The SANs will be directly connected to one another via l

The correct answer is C. Single-mode. For long-distance SAN connectivity between datacenters using long-wave SFPs, single-mode fiber optic cable is the required medium.

Storage Connectivity

Question

An administrator has built two storage arrays for a BCDR solution. Each array is in a different datacenter and each datacenter has its own SAN. The SANs will be directly connected to one another via long-wave SFPs. Which of the following cable types should the administrator use to facilitate connectivity?

Options

  • ACAT6
  • BCAT5e
  • CSingle-mode
  • DMultimode

How the community answered

(52 responses)
  • A
    4% (2)
  • B
    10% (5)
  • C
    85% (44)
  • D
    2% (1)

Why each option

For long-distance SAN connectivity between datacenters using long-wave SFPs, single-mode fiber optic cable is the required medium.

ACAT6

CAT6 is a copper-based Ethernet cable suitable for relatively short distances within a local network, not for long-distance SAN connections or fiber optic transceivers.

BCAT5e

CAT5e is an older generation of copper Ethernet cable, even less suitable for long-distance, high-speed SAN connectivity and incompatible with fiber optic SFPs.

CSingle-modeCorrect

Long-wave SFPs are designed to transmit data over significantly longer distances, typically many kilometers, which necessitates the use of single-mode fiber optic cable. Single-mode fiber has a very small core that allows light to travel along a single path, minimizing signal dispersion and enabling extended reach.

DMultimode

Multimode fiber optic cable is used for shorter distances, typically within a few hundred meters, because its larger core allows multiple light paths, leading to signal degradation over longer distances and incompatibility with long-wave SFPs.

Concept tested: Fiber optic cable types for distance

Source: https://learn.microsoft.com/en-us/training/modules/network-fundamentals-networking-devices/3-network-cables-and-connectors

Topics

#fiber optic cabling#single-mode fiber#SAN connectivity#long-wave SFP

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