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單項(xiàng)選擇題Which name describes an IPV6 host-enable tunneling technique that uses IPV4 UDP,does not require dedicated gateway tunnels,and can pass through existing IPV4 NAT gateways?（）

A.dual stack
B.dynamic
C.Teredo
D.Manual 6to4

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1.多項(xiàng)選擇題 以下哪項(xiàng)陳述描述圖形所示的網(wǎng)絡(luò)？（）

A.有網(wǎng)絡(luò)中的兩個(gè)廣播域。
B.有網(wǎng)絡(luò)四個(gè)廣播域。
C.有網(wǎng)絡(luò)在六個(gè)廣播域。
D.有網(wǎng)絡(luò)四個(gè)沖突域。
E.有網(wǎng)絡(luò)在五個(gè)沖突域。
F.有網(wǎng)絡(luò)七個(gè)沖突域。

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2.單項(xiàng)選擇題A receiving host computes the checksum on a frame and determines that the frame is damaged.The frame is then discarded.At which OSI layer did this happen？（）

A.session
B.network
C.physical
D.data link
E.transport

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3.多項(xiàng)選擇題Which three statements about EIGRP are true?（）

A.EIGRP converges fast RIP because of DUAL and backup routes that are stored in the topology table.
B.EIGRP uses a hello protocol to establish neighbor relationships
C.EIGRP uses split horizon and reverse poisoning to avoid routing loops.
D.EIGRP uses periodic updates to exchange routing information
E.EIGRP allows routers of different manufacturers to interoperate
F.EIGRP supports VLSM and authentication for routing updates.
G. EIGRP use a broadcast address to send routing information.

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4.單項(xiàng)選擇題Which Cisco IOS diagnostics command can disrupt the operation of a router under high-load conditions?（）

A.show running-config
B.show processes cpu
C.debug all
D.logging host ip address

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5.單項(xiàng)選擇題哪個(gè)命令可以在交換機(jī)啟用RSTP？（）

A. spanning-tree mode rapid-pvst
B. spanning-tree uplinkfast
C. spanning-tree backbonefast
D. spanning-tree mode mst

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