单项选择题

Which command displays the CHAP authentication process as it occurs between two routers?（）

A. debug authentication
B. debug chap ppp
C. debug chap authentication
D. debug ppp authentication

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单项选择题

A. Layer 3
B. Layer 4
C. Layer 2
D. Layer 5

单项选择题

A. show ip ospf lsa database
B. show ip ospf link-state
C. show ip ospf neighbors
D. show ip ospf database

单项选择题

A. show ip access-list
B. show access-list
C. list ip interface
D. show interface
E. show ip interface