Implementing Cisco IP Switched Networks (SWITCH v2-0) (#506)

Which statement about RSPAN session is true?

Only the source switch in a session must support RSPAN.
The same RSPAN VLAN is used for a RSPAN session on all switches.
At least one access port must be configured in the RSPAN VLAN.
RSPAN support by default monitors at Layer 2 switch protocols.