Network hub, switch, router. What is the difference?

Question

Network hub, switch, router. What is the difference?

Answer 1

hubs have fixed speeds. a 100Mb/s connection on a 10Mb/s hub will slow it down to 10Mb/s.

switches allow for mixed speed connections. you'll be limited only by the speed of the computer you're connecting to. if you connect to a 1000Mb/s connected computer and you have the same speed connection then you'll get full bandwidth. if you connect to a 10Mb/s computer then you'll be limited by that speed.

if you were on the 10Mb/s hub then you'll all be running only at 10Mb/s no matter who you connect to.

router allow for internet connection sharing. it routes traffice to the WAN (internet). most are switches also.

Answer 2

A hub enables multiple connections on a network.

A switch adds automatic collision control to a hub.

A router may include a switch but adds the capability of logically controlling and directing traffic between different subnets.

That's very basic.  Check the link below for more detail.