单项选择题
With VPLS， which protocol is used for label exchange and PW signalling？（）
A.MP-BGP B.LDP C.Directed LDP D.MTP E.BGP F.IGP
单项选择题 WhenIPv6isdeployedbyaServiceProvidertobringonanIPv6Enterprise，whichtransitionstrategyworksthebest？（）
单项选择题 AccordingtoRFC3931，L2TPv3utilizestheIANAassignedIPprotocolIDof（）.
单项选择题 Based on the following output in a router A running LDP， which statement is true？（）
