SFP vs SFP+ vs QSFP: What's the difference?

The SFP port on a Gigabit switch is a slot designed for use with small form-factor pluggable connectors to enable data transmission

4 Gigabit Ethernet ports and 1 Gigabit SFP slot; 9K jumbo frames to increase data transfer rates; 1000Mbps full-duplex, 10100Mbps fullhalf-duplex,

slot designer An SFP slot on a switch refers to a Small Form-factor Pluggable slot, which is a hot-swappable interface that allows for the connection of

slot conveyor My questio is, can SFP+ slots support both SFP and SFP+ modules and should operate at the same time, in switch like WS-C3850-48P-L or WS-C3850-24P-L ? we