单项选择题

Which statement is true about the internal link between the Routing Engine and the Packet-Forwarding Engine？（）

A.It is only used for exception traffic.
B.It is an FE link called fxp2.
C.It is rate-limited to avoid DDOS attacks.
D.It is only used to send the forwarding-table from the Routing Engine to the Packet-Forwarding Engine.

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