The cable length limit still applies to the cable on each side of the repeater. ... Well, technically, that's not true because the switches themselves function as repeaters. You typically see repeaters as stand-alone devices only when a single cable segment would be more than 100 meters.

Can a switch be used as a repeater?

yes the switch can work as repeater, but you have to take in consideration the delay switch time.

Is switch a multiport repeater?

Switch – A switch is a multiport bridge with a buffer and a design that can boost its efficiency(a large number of ports imply less traffic) and performance. A switch is a data link layer device.