Question: what is the difference between hubs switches bridges routers repeaters and amplifiers?
Answer: Repeater – A repeater operates at the physical layer. ... 
Hub – A hub is basically a multiport repeater. ... 
Bridge – A bridge operates at data link layer. ... 
Switch – A switch is a multi port bridge with a buffer and a design that can boost its efficiency(large number of ports imply less traffic) and performance.