A customer is discussing QoS requirements with a network consultant. The customer has specified that endto-end path verification is a requirement.
Which QoS solution meets this requirement?
A . IntServ model with RSVP to support the traffic flows
B . DiffServ model with PHB to support the traffic flows
C . marking traffic at the access layer with DSCP to support the traffic flows
D . marking traffic at the access layer with CoS to support the traffic flows
Answer: A