The first thing to look at is whether the computer network card is a 100M network card or a Gigabit network card. The USB2.0 network card is also a 100M network card. Only USB3.0 network cards can be Gigabit.

The second point is to check whether your router’s network port is 100M or Gigabit.

The 100M speed test is generally around 10~11Mbps and the 200Mbps speed test is around 20~25Mbps. Another possibility is to look at the units. Different units will display different numbers.