A.Theyareusedtosummarizearearoutestootherareas.
B.Theyareusedinnot-so-stubbyareastopropagateexternalroutes.
C.TheyareusedtonotifyareasoftheASBR.
D.Theyarefloodedtoallareasexceptstubareas(externalroute).
正确答案:参考D

A.Theyareusedtosummarizearearoutestootherareas.
B.Theyareusedinnot-so-stubbyareastopropagateexternalroutes.
C.TheyareusedtonotifyareasoftheASBR.
D.Theyarefloodedtoallareasexceptstubareas(externalroute).
正确答案:参考D