Which VPN QoS model guarantees the traffic from one customer edge (CE) to another?

The Pipe Model in VPN QoS is designed to guarantee bandwidth between one customer edge (CE) device to another. This model ensures a fixed amount of bandwidth is reserved for the traffic between these two points, providing a consistent and predictable service level. It is particularly useful in scenarios where a steady and reliable flow of data is critical. The Pipe Model contrasts with the Hose Model, which offers flexible bandwidth allocation based on the total amount of traffic entering and leaving the network, without guaranteeing individual flows between specific CEs.

References: This information aligns with the QoS strategies for VPNs that are part of the EC-Council’s Certified Network Defender (CND) curriculum, which includes understanding various QoS models and their implications on network traffic1.