Which of the following statements about the control plane operation is TRUE?

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For the inter-AS model A VPRN. BGP is used as the PE-CE routing protocol.

Which of the following statements about the control plane operation is TRUE?
A . PE1 sends an IPv4 update for prefix 192.168.1.0/27 via MP-BGP to ASBR1.
B. ASBR1 sends an IPv4 update for prefix 192.168.1.0/27 to ASBR2.
C. ASBR1 transforms an IPv4 update for prefix 192.168.1.0/27 to a VPN-IPv4 route; allocates VPN label V1 and sends the update to ASBR2.
D. ASBR2 accepts a VPN-IPv4 update from ASBR1, then sends the update to PE2 via MP-BGP.

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Answer: B