能够帮助获得强密码策略的具体方法（）

多项选择题能够帮助获得强密码策略的具体方法（）

A.登陆尝试失败一定次数后禁用账号
B.设置密码有效期
C.不使用明文密码
D.使用强密码

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1.单项选择题 A network administrator is troubleshooting the OSPF configuration of routers R1 an dR2.The routers cannote stablish an adjacency relation ship on their common Ethernet link.The graphic shows the output of the show ip ospf interface e0 command for routers R1 an dR2.Based on the information in the graphic，what is the cause of this problem？（）

A.The OSPF area is not configured properly.
B.The priority on R1 should be set higher.
C.The cost on R1 should be set higher.
D.The hello and dead timers are not configured properly.
E.A backup designated router needs to be added to the network.
F.The OSPF process ID numbers must match.

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2.单项选择题What is the principle reason to use a private IP address on an internal network?（）

A.Subnet strategy for private companies.
B.Manage and scale the growth of the internal network.
C.Conserve public IP addresses so that we do not run out of them.
D.Allow access reserved to the devices.

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3.单项选择题Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs?（）

A.data link
B.network
C.transport
D.presentation
E.physical

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4.多项选择题拒绝服务攻击的主要原因（）

A.中间人泄露信息
B.主机或应用程序处理非预期状况失败
C.缓冲区溢出
D.网络、主机或应用程序不能处理量非常大的数据

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5.单项选择题Host 1 sends an ICMP echo request to remote sever1. Layer2 header of the frame containing the ping packet（）。

A.The IP address of sever 1.
B.The MAC address of NIC in sever 1.
C.The IP address of F0/0 interface of router R1.
D.The MAC address of the Fa0/0 interface of router R1.
E.The IP address of the s0/0/0 interface of router R2
F.The MAC address of the s0/0/0 interface of router R2

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6.多项选择题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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7.单项选择题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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8.多项选择题常见的网络攻击方法有（）

A.病毒攻击
B.侦查攻击
C.接入攻击
D.拒绝服务攻击

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9.单项选择题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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10.单项选择题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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