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多項選擇題在企業(yè)基礎(chǔ)架構(gòu)中的SAN，是為了滿足（）業(yè)務(wù)的需求

A.提高企業(yè)信息處理的能力
B.降低資本和運行的費用
C.提高靈活性，以支持不斷變化的業(yè)務(wù)優(yōu)先級、應(yīng)用增長和收入增長
D.改善遠(yuǎn)距離復(fù)制、備份和恢復(fù)，以滿足法規(guī)要求和行業(yè)最佳做法

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1.單項選擇題Which command enables RSTP on a switch？（）

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

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2.單項選擇題Refer to the exhibit A frame on vlan 1on switch s1 is sent to switch s2 when the frame is received on vlan 2,what causes this behavior?（）

A.trunk mode mismatches
B.vlans that do not correspond to a unique IP subnet
C.native vlan mismatches
D.allowing only vlan 2 on the destination.

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3.多項選擇題下列哪些是針對VoIP的網(wǎng)絡(luò)威脅（）

A.對于語音資源的非授權(quán)訪問
B.危害網(wǎng)絡(luò)資源
C.偷聽
D.DoS攻擊

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4.單項選擇題Assuming default setting,how can you erase the VTP database 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 vlan date file, then reload.
D.Cycle the switch power.

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5.單項選擇題DNS servers provide what service？（）

A.they run a spell check on host names to ensure accurate routing
B.they map individual hosts to their specific IP address
C.they convert domain names into IP address
D.Given an IP address，they determine the name of the host that is…

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