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單項(xiàng)選擇題A network admin wants to know every hop the packets take when he accesses cisco.com. Which command is the most appropriate to use?（）

A.path cisco.com
B.debug cisco.com
C.trace cisco.com
D.traceroute cisco.com

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1.多項(xiàng)選擇題下列哪些是TACACS+的關(guān)鍵因素（）

A.不兼容TACACS和XTACACS
B.認(rèn)證和授權(quán)分離
C.加密所有通信
D.使用TCP端口49

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2.單項(xiàng)選擇題Which line from the output of the show ip interface command indicates a layer 1 problem?（）

A.Serial0/1 is up, line protocol is down
B.Serial0/1 is down, line protocol is down
C.Serial0/1 is up, line protocol is up
D.Serial0/1 is administratively down, line protocol is down

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3.多項(xiàng)選擇題Cisco提供（）方法來(lái)實(shí)現(xiàn)AAA服務(wù)

A.基于AAA授權(quán)
B.本地AAA認(rèn)證
C.基于服務(wù)器的AAA認(rèn)證
D.AAA記賬

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4.單項(xiàng)選擇題Which statement about IPv6 is true?（）

A.Addresses are not hierarchical and are assigned at random.
B.Only one IPv6 address can exist on a given interface.
C.There are 2.7 billion addresses available.
D.Broadcasts have been eliminated and replaced with multicasts.

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5.單項(xiàng)選擇題Which statement about RIPng is true?（）

A.RIPng allows for routes with up to 30 hops.
B.RIPng is enabled on each interface separately.
C.RIPng uses broadcasts to exchange routes.
D.There can be only one RIPng process per router.

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