What role do network devices play in the IntServ QoS model?
- Network devices ensure that resources are available before traffic is allowed to be sent by a host through the network.
- Network devices provide a best-effort approach to forwarding traffic.
- Network devices are configured to service multiple classes of traffic and handle traffic as it may arrive.
- Network devices use QoS on a hop-by-hop basis to provide excellent scalability.
Explanation: The IntServ QoS model uses resource reservation to guarantee bandwidth and packet-loss rates from end to end. IntServ uses a connection-oriented approach to ensure that available resources are sufficient in the network for the traffic to have a specific level of QoS.