單項(xiàng)選擇題All WAN links is side the TestKing.com network use PPP with for authentication security. Which command will display the CHAP authentication process as it occurs between two routers in the network?（）

A. show CHAP authentication
B. show interface serial 0
C. debug PPP authentication
D. debug CHAP authentication
E. show PPP authentication CHAP



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2.單項(xiàng)選擇題How many usable sub network and usable hosts per subnet result in the network address 201.105.13.0 is sub netted with a mask of /26? （）

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