Regarding BGP/MPLS IPVPN data forwarding, which of the following descriptions is wrong?

Regarding BGP/MPLS IPVPN data forwarding, which of the following descriptions is wrong?
A . When data is transmitted on the BCP/MPLS IPVPN backbone network, it always carries two layers of labels
B . The inner label during data forwarding is assigned by MP-BGP
C . The outer label during data forwarding can be allocated by LDP
D . The data sent by the PE to the CE is an IPv4 packet

View Answer

Answer: A