HUb: limited port compare to switch.less speed compare to switch because more collision.

Switch: To Avoid collision we use switch. In switch Each Port having own collision Domain.

HUB:Hub is a layer-1 device,in this data transmission in the form of bits.

SWITCH:Switch is a layer-2 device,in this data transmission in the form of frames.

Switches

Bi directional information.

It exchanges the data

Hubs

to connect the computers

It gives the acknowledgment for received data