Topology image transparency problem

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
50/100
Issue type
Documentation
Clarity
Mostly clear
Activity status
Stale
Domain
documentation

Research direction

Open the Router Exercise wiki page and inspect the basic-topology image in GitHub's dark theme. Trace where that image is stored or referenced, then verify that the corrected image displays clearly in both light and dark themes. Done means the topology remains readable without transparency-related artifacts.

Written by the indexing model from the issue text.

Description

In chapter Router Exercise, it seems that the image that shows the basic topology is trasparent something that causes the following problem when GitHub's dark theme is enabled:
image

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410
Forks
120
PR merge metrics
No merged PRs in 30d

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