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A. the autonomous system of a different interior gateway protocol (IGP) B. area0 C. totally stubby D. NSSA E. stub F. the autonomous system of an exterior gateway protocol (EGP)
C. Torally Stubby
E. Stub
Ref: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a74.shtml