As shown in the figure, the data traffic before roaming is forwarding as the STA-HAP- upper network, and the forwarding method is direct forwarding, and the home agent is configured on the AP. After three-layer roaming, what is the direction of data forwarding traffic?

As shown in the figure, the data traffic before roaming is forwarding as the STA-HAP- upper network, and the forwarding method is direct forwarding, and the home agent is configured on the AP. After three-layer roaming, what is the direction of data forwarding traffic?

A . STA-FAP-FAC-HAC-HAP- upper network
B . STA-FAP-FAC-HAC- Upper Network
C . STA-FAP-FAC- Upper Network
D . STA-FAP-FAC-HAC-HAP-HAC- upper network

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Answer: A