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.

A. supports multiple protocols
B. works only in a shared or loop environment
C. allows addressing for up to 4 million nodes
D. provides a high speed transport for SCSI payloads