Which three configuration steps must be completed for a Cisco router in order to enable local AAA login authentication?（） (Choose three.)

单项选择题Which QoS mechanism will allow a single policy to be applied to multiple interfaces?（）

A. policy map
B. class map
C. ACL
D. service policy

单项选择题What can be specified in IP VACLs?（）

A. Protocol and IP source only
B. IP Source, IP Destination and ports
C. IP Source Only
D. IP Destination Only

单项选择题A Cisco Catalyst switch is part of the CIS network. As an experienced network administrator, you are thinking of filtering the traffic within VLANI00 with the use of a VACL named test on that switch. Which of the following command will enable that?（）

A. interface vlan 100 ip access-group test in
B. interface vlan 100 ip access-group test
C. vlan access-map test 100
D. vlan filter test vlan-list 100

多项选择题avoid Layer 2 loops. Which two of the following are most probably the reasons for that preference?（）

A. Information about port roles is sent to all switches.
B. RSTPs that are based on Cisco products require no additional configuration.
C. Features such as UplinkFast and BackboneFast are compatible with RSTP.
D. An RSTP that is based on Cisco products generally performs better than the Cisco proprietary 802.1D enhancements.

单项选择题As an experienced Network Engineer, you are responsible for network connectivity and system configuration. Which of the following protocols will be supported by Cisco Nonstop Forwarding (NSF)?（）

A.ISSU，OSPF，IS-IS
B.IETF，OSPF，ISSU
C.IS-IS，EIGRP，SSO，BGP
D.EIGRP，BGP，OSPF，IS-IS