Refer to the exhibit. A network engineer received a sudden request to prioritize voice over his Cisco network and he has decided to leverage the AutoQoS feature. Based on the output shown, which two tasks need to be performed prior to issuing the autoqos voip command in this router? （）
A.Enable Cisco Express Forwarding.
B.Enable fast switching.
C.Delete all policy maps.
D.Remove service-policy commands from interface serial1/0.
E.Delete all the currently configured class maps.
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A.1
B.2
C.4
D.6
E.8
Refer to the exhibit. This exhibit shows the NAT configuration for Router A and the output for a ping issued from device 171.68.200.48 and destined to 172.16.47.142. Based on this information， what change must be made to Router A in order for the ping to work？（）
A.reload the router
B.clear the route cache
C.add a static route
D.configure IP as classless
E.load a newer IOS image
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When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）
一堆交換機一個server、一個transpare，問配置prune在哪里配置？
As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?（）
What is method list for configure aaa？
問一個怎么樣的屬性，能讓路由不通告給任何的peer？
Refer to the exhibit.Which statement describes DLCI 17?（）
four switches， which one will be root switch.（no pic）.
R1 will choose which path to reach 10.1.0.0？
如何實現(xiàn)擁塞避免？
The Frame Relay network in the diagram is not functioning properly.What is the cause of the problem?（）