internal/Internal-Services.md
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@@ -27,7 +27,6 @@ See this [page](/services/ca/Certificate-Authority) for the main certificate aut
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- ISP Viewer: [isp42.strexp.net (via IANA)](https://isp42.strexp.net)
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- Registry Timeline: [timeline42.strexp.net (via IANA)](https://timeline42.strexp.net)
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- Various DN42-related tools: [dn42.g-load.eu/toolbox/](https://dn42.g-load.eu/toolbox/)
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-- Web-based Ping & Traceroute: [ping.dn42](https://ping.dn42), or [ping2.sh](https://ping2.sh) (via clearnet)
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### Looking glasses
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See [Looking Glasses](/services/Looking-Glasses).
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@@ -305,6 +304,7 @@ Test out your skills with online challenges
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| <https://burble.dn42/services/ping/> | burble.dn42 ping challenge |
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| <http://kioubit.dn42/challenge/ch1/> | Kioubit.dn42 challenge 1 |
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| <http://kioubit.dn42/challenge/ch2/> | Kioubit.dn42 challenge 2 |
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+| <https://exam.edu.dn42/?topic=dn42> | Online test center, quizzes for testing your network skills! Run by NEXUS-MNT |
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## Virtual machines