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單項(xiàng)選擇題The network administrator is asked to configure 113 point-to-point links.Which IP addressing scheme best defines the address range and subnet mask that meet the requirement and waste the fewest subnet and host addresses?（）

A.10.10.0.0/18 subnetted with mask 255.255.255.252
B.10.10.0.0/25 subnetted with mask 255.255.255.252
C.10.10.0.0/24 subnetted with mask 255.255.255.252
D.10.10.0.0/23 subnetted with mask 255.255.255.252
E.10.10.0.0/16 subnetted with mask 255.255.255.252

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1.多項(xiàng)選擇題使用ACL可以過濾哪些流量（）

A.ICMP消息
B.Traceroute
C.DOS TCP SYN
D.DOS smurf

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2.單項(xiàng)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 ofthe agreement.
B.Addresses are assigned for a fixed period of time.At the end of period，a newquest for an address mustbe made ，and another address is then assigned.
C.Addresses are leased to host.A host will usually keep the same address by periodicallycontacting theDHCP 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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3.單項(xiàng)選擇題Which command enhances the 802.1D convergence time on ports that are connected to hosts？（）

A.spanning-tree backbonefast
B.spanning-tree uplinkfast
C.spanning-tree portfast
D.spanning-tree cost512

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4.多項(xiàng)選擇題使用ACL可以減少哪些攻擊（）

A.拒絕服務(wù)器攻擊
B.IP地址欺騙
C.DOS TCP SYN攻擊
D.DOS smurf攻擊

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5.單項(xiàng)選擇題Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch overFastEthernet？（）

A.802.3ad
B.802.1w
C.802.1Q
D.802.1d

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