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200-301 · Question #588

200-301 Question #588: Real Exam Question with Answer & Explanation

The correct answer is B: An incorrect type of transceiver has been inserted into a device on the link.. Here we see that Site A is using an SR SFP, while Site B is using an LR SFP. At a distance of 7 KM, both locations should be using an LR SFP. As a side note, using incompatible SFP’s like in this example should cause the link to remain down.

Submitted by cyberguy42· Mar 5, 2026Network Access

Question

Refer to the exhibit. Site A was recently connected to site B over a new single-mode fiber path. Users at site A report Intermittent connectivity Issues with applications hosted at site B. What is the reason for the problem?

Options

  • AHeavy usage is causing high latency.
  • BAn incorrect type of transceiver has been inserted into a device on the link.
  • Cphysical network errors are being transmitted between the two sites.
  • DThe wrong cable type was used to make the connection.

Explanation

Here we see that Site A is using an SR SFP, while Site B is using an LR SFP. At a distance of 7 KM, both locations should be using an LR SFP. As a side note, using incompatible SFP’s like in this example should cause the link to remain down.

Topics

#Fiber optics#Transceivers#Physical layer troubleshooting#Single-mode fiber

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