单项选择题
A. To provide a visible extension of MPLS TTL functionality in a non MPLS-enabled domain
B. To improve the IGP convergence time
C. To hide visibility to the core (provider) routers in the MPLS network
D. To provide a visible extension of IP TTL functionality in an MPLS-enabled domain
多项选择题 Which of the following statements about authentication responses and conditions is true? （）(Choosetwo.)
单项选择题 Which information is contained in a AAA authentication method list?（）
多项选择题 Which three configuration steps must be completed for a Cisco router in order to enable local AAA login authentication?（） (Choose three.)