YouneedtoconfigureaGREtunnelonaIPSecrouter.WhenyouareusingtheSDMtoconfigureaGREtunneloverIPsec，whichtwoparametersarerequiredwhendefiningthetunnelinterfaceinformation？（）

A.ThecryptoACLnumber
B.TheIPSECmode（tunnelortransport）
C.TheGREtunnelinterfaceIPaddress
D.TheGREtunnelsourceinterfaceorIPaddress，andtunneldestinationIPaddress
E.TheMTUsizeoftheGREtunnelinterface

【参考答案】

C, D