Implementing Cisco IP Switched Networks (SWITCH v2-0) (#43)

When you enable MST on the switch, what happens?

Enables RSTP and use BPDU type 2, maximum 16 instances to be used.
Enables RSTP and use BPDU type 4, maximum 16 instances to be used.
Disables RSTP and use BPDU type 2, maximum 16 instances to be used.
Disables RSTP and use BPDU type 4, maximum 16 instances to be used.