單項(xiàng)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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多項(xiàng)選擇題

下列哪些是針對(duì)VoIP的網(wǎng)絡(luò)威脅（）

A.對(duì)于語(yǔ)音資源的非授權(quán)訪問(wèn)
B.危害網(wǎng)絡(luò)資源
C.偷聽(tīng)
D.DoS攻擊

單項(xiàng)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.