The MTU: when to lower it, and why never by guess
Small packets pass and large ones stall: measuring the path's real ceiling, setting it, and declaring it.
18 minutesTechnical content last reviewed on 21 Sept 2026
This lesson is for signed-in learners
Create an account to subscribe and record your learning progress.
What this lesson builds
- Configuring the network so it survives a reboot
- Deciding whether a destination is a neighbour
- Narrowing an unknown failure to one component