In the Layer 3 inter-WAC roaming scenario, if the terminal data forwarding mode is configured as direct forwarding mode, and the WAC and the user's gateway are reachable at Layer 2, then the user's…

Question

Options

• ATrue
• BFalse

• A
  83% (25)
• B
  17% (5)

Explanation

A is correct because in a Layer 3 inter-WAC roaming scenario using direct forwarding mode, when the WAC and the user's gateway share Layer 2 reachability, it is both technically valid and advantageous to place the home agent (HA) on the HAC rather than the HAP - this shifts processing load away from the access point hardware, and since the tunnel runs from the FAP directly to the HA, locating the HA on the more central HAC rather than the HAP shortens that tunnel path.

B (False) is wrong because the claim is accurate: direct forwarding mode combined with L2 reachability between the WAC and the gateway is precisely the condition that makes HAC-based HA placement feasible and efficient - denying this contradicts standard WAC roaming architecture behavior.

Memory tip: Think of the HAC as a "smarter relay hub" - when L2 reachability exists, you can "pull the home agent up" from the HAP to the HAC, making the tunnel shorter (FAP → HAC instead of FAP → HAP) and giving the lightweight HAP a break. Direct forwarding + L2 = HA on HAC = shorter tunnel + less HAP burden.

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