In order to reduce the number of OSPF routes in certain areas, the OSPf protocol has developed special area functions, and the following description of the characteristics of OSPF special areas is correct

In order to reduce the number of OSPF routes in certain areas, the OSPf protocol has developed special area functions, and the following description of the characteristics of OSPF special areas is correct
A . ASBR-Sunmary-LSA is allowed to be published to the NSSA region
B . AS-External-LSA is allowed to be published to the Stub region
C . Any OSPF zone can be configured as a special zone
D . Zone can be equipped with zhiyi

Answer: D