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

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?

Exhibits

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.

How the community answered

(62 responses)

A
11% (7)
B
60% (37)
C
24% (15)
D
5% (3)

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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