多选题Which two statements are true about RSVP and the InServ QoS model？（）Aa drawback of implementing RSVP is the requirement to migrate to a supporting routing protocolBRSVP uses DSCP to signal QoS requirements to routersCRSVP is a routing protocolDRSVP is an IP protocol that uses IP protocol ID 46， and TCP/UDP ports 3455ERSVP specifically provides a level of service for rate-sensitive and delay-sensitive trafficFthe flow-based approach of RSVP is ideal for large， scalable implementations such as the public internet
多选题
Which two statements are true about RSVP and the InServ QoS model？（）
A
a drawback of implementing RSVP is the requirement to migrate to a supporting routing protocol
B
RSVP uses DSCP to signal QoS requirements to routers
C
RSVP is a routing protocol
D
RSVP is an IP protocol that uses IP protocol ID 46， and TCP/UDP ports 3455
E
RSVP specifically provides a level of service for rate-sensitive and delay-sensitive traffic
F
the flow-based approach of RSVP is ideal for large， scalable implementations such as the public internet
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