Which two are characteristics of RSVP? (Choose two.)

A.
RSVP itself provides bandwidth and delay guarantees.

B.
For RSVP to be end-to-end, all devices must support RSVP.

C.
RSVP reservations are maintained by a centralized reservations server.

D.
An RSVP compatible QoS mechanism must be used to implement guarantees according to RSVP reservations.

Explanation: