單項選擇題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.多項選擇題

以下哪項陳述描述圖形所示的網(wǎng)絡(luò)？（）

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

3.多項選擇題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.

4.單項選擇題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

5.單項選擇題哪個命令可以在交換機啟用RSTP？ （）

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