Lesson 4
Speed, Lag and the Speed Test
Tell speed from lag, read the numbers honestly, and run a test that shows which link is the bottleneck.
Predict
Amira’s laptop, plugged into the hub by cable, tests at 145 Mbps, far more than a video call needs. Yet her calls freeze every evening, just as her partner’s phone starts backing up the day’s photos to the cloud.
What is the call short of?
Choose a prediction, then select Next to see the answer.