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單項(xiàng)選擇題

Which layer of the OSI reference model uses the hardware address of a device to ensure message delivery to the proper host on a LAN?（）

A.physical
B.datalink
C.network
D.transport

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多項(xiàng)選擇題

常見(jiàn)的網(wǎng)絡(luò)攻擊方法有（）

A.病毒攻擊
B.偵查攻擊
C.接入攻擊
D.拒絕服務(wù)攻擊

單項(xiàng)選擇題

assuming the default switch configuration which vlan range can be added modified and removed on a ciscoswitch？（）

A.2 through 1001
B.1 through 1001
C.1 through 1002
D.2 through 1005

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