A. show port networkB. show running-configC. show contr……

单项选择题In comparison with traditional Layer 2 and Layer 3 system, Cisco Catalyst 6500 Virtual Switching System (VSS) 1440 simplifies a network by the means of:（）

A. providing loop-free technology.
B. providing HSRP/VRRP.
C. managing additional routing peers.
D. managing two nodes and configuration.

单项选择题You are working with a client to deploy QoS on their Frame Relay WAN. They would like to be able to allow packets to cross the Frame Relay WAN but have them marked as discard eligible if they exceed the QoS policy. How would you accomplish this task?（）

A. Configure a class map that sets the DE bit so that the policy map can correctly apply a violate-action if the policy is exceeded.
B. Configure a service policy that sets the DE bit and apply it to the serial interface connected to the Frame Relay WAN.
C. Configure a policy map that has a burst-max action of setting the DE bit if the policy is exceeded.
D. Configure a policy map that has a violate-action to change the DE bit from 0 to 1.

单项选择题What is a new feature of the Cisco ISR router? （）

A. advanced integration module
B. FICON ports
C. Cisco CallManager 5.0 support
D. warm Cisco IOS upgrade feature

多项选择题Which two of the following actions must an OSPF NSF-capable router execute after a supervisor engine switchover?（） (Choose two.)

A. Re-learn the available OSPF neighbors with neighbor relationship restart
B. Send the graceful restart message
C. Re-acquire the link state database content for the network
D. Re-learn the available OSPF neighbors without neighbor relationship restart

单项选择题What is the purpose of IP Event Dampening?（）

A. to configure a subinterface so that it can be applied to the primary interface in order to prevent exponential selective dampening
B. to suppress the effects of excessive interface flapping events on routing protocols and routing tables in the network
C. to introduce a nonconfigurable exponential delay mechanism
D. to allow the network operator to configure a router to automatically dampen and selectively identify a local interface that is failing