A.L2TP B.2547bis C.L2F D.PPTP E.MPLS
A.The default OSPF domain-id is 127.0.0.1. B.It most cases, a domain-id must be configured. C.It most cases, you do not need to configure a domain-id. D.For a layer 3 VPN connecting multiple OSPF domains, configuring a domain-id can help control LSA translations.
A.The BGP next hop must be in inet.1. B.The BGP next hop must be in inet.3. C.Must have a bidirectional LSP configured. D.Must have a static route to allow an RP for connected interfaces.