In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Regarding the description of the two layers of labels, which of the following options is wrong?

In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Regarding the description of the two layers of labels, which of the following options is wrong?
A . The outer label of MPLS VPN is allocated by the LDP protocol or statically, and the inner label is allocated by the MP-BGP neighbor at the correct end.
B . The outer label of MPLS VPNE is called the private network label, and the inner label is called the public network label.
C . By default, the outer label is singled out before the packet is forwarded to the last hop device
D . The outer label is used to correctly send the data packet to the corresponding VPN on the PE device

Answer: B