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多項(xiàng)選擇題What are three advantages of VLANs？（）

A.VLANs establish broadcast domains in switched networks.
B.VLANs utilize packet filtering to enhance network security.
C.VLANs provide a method of conserving IP addresses in large networks.
D.VLANs provide a low-latency internetworking alternative to routed networks.
E.VLANs allow access to network services based on department,not physical location.
F.VLANs can greatly simplify adding,moving,or changing hosts on the network.

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1.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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2.多項(xiàng)選擇題常見的網(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

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3.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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4.單項(xiàng)選擇題Which option is a valid IPv6 address?（）

A.2001:0000:130F::099a::12a
B.2002:7654:A1AD:61:81AF:CCC1
C.FEC0:ABCD:WXYZ:0067::2A4
D.2004:1:25A4:886F::1

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5.單項(xiàng)選擇題which command is used to enable CHAP authentication whit PAP as the fallback method on a serialinterface？（）

A.（config-if）#authentication ppp chap fallback ppp
B.（config-if）#authentication ppp chap pap
C.（config-if）#ppp authentication chap pap
D.（config-if）#ppp authentication chap fallback ppp

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