User Based Tunneling (UBT) uses which encapsulation?

User Based Tunneling (UBT) uses which encapsulation?

• A. Encapsulated in UDP
• B. GRE
• C. IP in IP
• D. MPLS

Answer: (B)

UBT carries user traffic through a dedicated tunnel between the access point and the controller, and that tunnel uses GRE encapsulation. GRE is a versatile tunneling protocol that wraps the user’s IP packets inside a GRE header, allowing the controller to apply policy and security to the traffic regardless of where the user is on the network. It’s a flexible choice because it can carry multiple payload types and doesn’t restrict the encapsulated traffic to a single protocol. Other options—UDP encapsulation, IP in IP, or MPLS—serve different needs or environments and aren’t the standard for this tunnel in UBT.

UBT carries user traffic through a dedicated tunnel between the access point and the controller, and that tunnel uses GRE encapsulation. GRE is a versatile tunneling protocol that wraps the user’s IP packets inside a GRE header, allowing the controller to apply policy and security to the traffic regardless of where the user is on the network. It’s a flexible choice because it can carry multiple payload types and doesn’t restrict the encapsulated traffic to a single protocol. Other options—UDP encapsulation, IP in IP, or MPLS—serve different needs or environments and aren’t the standard for this tunnel in UBT.