单项选择题

In MPLS networks, what s the benefit of disabling TTL propagation?（）

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

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多项选择题

Which of the following statements about authentication responses and conditions is true? （）(Choosetwo.)

A. When a router receives a failure response, it stops querying authentication methods.
B. When a router receives an error response, it stops querying authentication methods.
C. If the router receives a failure response from an authentication method, it queries the next method.
D. The router does not differentiate between failure and error responses; the authentication process is always interrupted.
E. If it receives no response from the authentication method, a router will determine the error condition On its own; the router also has the option to proceed to the next method in a list if configured accordingly.

单项选择题

Which information is contained in a AAA authentication method list?（）

A. A pointer to the address where a RADIUS server can be located
B. A sequential list of user authentication methods
C. A description of what a user can execute on a router
D. The setup for the authentication phase on a router

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.)

A. Apply the method list to an interface
B. Specify the default method list and apply it to the interface
C. Enable AAA
D. Define a method list