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單項選擇題How dose a DHCP server dynamically assign IP address to host?（）

A.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B.Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address must be made ,and another address is then assigned.
C.Addresses are leased to host.A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.
D.Addresses are permanently assigned so that the host uses the same address at all times.

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1.多項選擇題IPS的特征行動有（）

A.重置UDP
B.產(chǎn)生一個警報
C.丟去或阻止這個行為
D.允許該行為

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2.多項選擇題Cisco IDS和IPS傳感器可以使用（）特征觸發(fā)類型

A.基于樣本的檢測
B.基于異樣的檢測
C.基于策略的檢測
D.基于沙盤的檢測

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3.單項選擇題What value is primarily used to determine which port becomes the root port on each nonroot switch in aspanning-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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4.單項選擇題What is the effect of using the service password-encryption command?（）

A.nly passwords configured after the command has been entered will be encrypted.
B.Only the enable password will be encrypted.
C.Only the enable secret password will be encrypted
D.It will encrypt the secret password and remove the enable secret password from the configuration.
E.It will encrypt all current and future passwords.

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5.多項選擇題IPS特征文件的屬性有（）

A.類型
B.服務(wù)
C.觸發(fā)
D.行動

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