Q46 Single choice Mark for later What is the purpose of an OSPF sham-link? A to allow inter-area routing when OSPF is used as the PE-CE connection protocol in an MPLS VPN network B to allow intra-area routing when OSPF is used as the PE-CE connection protocol in an MPLS VPN network C to correct OSPF backdoor routing when OSPF is used as the PE-CE connection protocol in an MPLSVPN network D to correct OSPF backdoor routing when OSPF is used as the PE-PE connection protocol in an MPLSVPN network Correct answer