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

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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.