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單項(xiàng)選擇題What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology？（）

A.lowest port MAC address
B.port priority number and MAC address
C.VTP revision number
D.highest port priority number
E.path cost

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1.單項(xiàng)選擇題In which solution is a router ACL used？（）

A.protecting a server frome unauthorized acces
B.controlling path selection，based on the route metric
C.reducing router CPU utilization
D.filterring packets that are passing through a router

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2.單項(xiàng)選擇題Assuming default setting，how can you erase the VTP data base of VLANs on a CISCO IOS switch running in VTP server mode？（）

A.Enable VTP pruning
B.From privileged mode，erase the startup configuration file，then reload.
C.From privileged mode，erase the vlandate file，then reload.
D.Cycle the switch power.

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3.單項(xiàng)選擇題一個(gè)默認(rèn)的幀中繼WAN被分類(lèi)為哪種物理網(wǎng)絡(luò)類(lèi)型？（）

A.點(diǎn)到點(diǎn)
B.廣播多路訪問(wèn)
C.非廣播多路訪問(wèn)
D.非廣播多點(diǎn)
E.廣播點(diǎn)到多點(diǎn)

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4.單項(xiàng)選擇題What is the function of the command switchport trunk native vlan 999 on a？（）

A.It designates VLAN 999 for untagged traffic.
B.It blocks VLAN 999 traffic from passing on the trunk.
C.It createsa VLAN 999 interface.
D.It designates VLAN 999 as the default for all unkown tagged traffic.

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5.多項(xiàng)選擇題What are three features of the IPV6 protocol？（）

A.complicated header
B.plug-and-play
C.no broadcasts
D.checksums
E.optional IPsec
F.autoconfiguration

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