多项选择题

Whichtwostatementsaretruewhenconfiguringadomain-id?()

A.ThedefaultOSPFdomain-idis127.0.0.1.
B.Itmostcases,adomain-idmustbeconfigureD.
C.Itmostcases,youdonotneedtoconfigureadomain-iD.
D.Foralayer3VPNconnectingmultipleOSPFdomains,configuringadomain-idcanhelpcontrolLSAtranslations.