
【名词&注释】
路由器(router)、应用层(application layer)、集线器(hub)、交换机(switch)、子网掩码(subnet mask)、物理层(physical layer)、会话层(session layer)、第三层(layer 3)
[多选题]对于IP为199.41.27.0,子网掩码为255.255.255.240,则该IP地址和子网掩码相作用会得到一系列IP,从下列选项中选出属于“有效IP”的选项:()
A. 199.141.27.33
B. 199.141.27.112
C. 199.141.27.119
D. 199.141.27.126
E. 199.141.27.175
F. F.199.141.27.208
查看答案&解析
举一反三:
[单选题]Which one of the following characteristics is true regarding the use of hubs and switches?
A. Hubs can have their ports be configured with VLANs
B. Using hubs is costly with regard to bandwidth availability.
C. Switches can not forward broadcasts.
D. Switches are more efficient than hubs in processing frames.
E. Switches increase the number of collision domains in the network.
[单选题]OSI七层模型中,物理层(physical layer)的数据封装名称为()
A. 比特
B. 帧
C. 包
D. 段
[单选题]在OSI七层模型中,介质工作在哪一层()
A. 传输层
B. 会话层(session layer)
C. 物理层(physical layer)
D. 应用层
[单选题]工作在OSI第三层(layer 3)的设备是:()
A. 网卡
B. 路由器
C. 交换机
D. 集线器
[单选题]路由器上,设置端口速率的命令是()
A. clock rate
B. bandwidth
C. set
D. encap
[单选题]IP扩展访问列表的数字标示范围是多少()。
A. 0-99
B. 1-99
C. 100-199
D. 101-200
[多选题]You need to configure an 802.1Q link on a Ezonexam switch. Which commands, when used together, would do this? (Select two answer choices)
A. Switch(vlan) mode trunk
B. Switch(config) switchport access mode trunk
C. Switch(config-if) switchport mode trunk
D. Switch(config-if) switchport trunk encapsulation dot1q
E. Switch(config) switchport access mode 1
F. F. Switch(vlan) trunk encapsulation dot1q
[单选题]扩展IP访问权限表的表号范围是:()
A. 1—100
B. 1-99
C. 100-199
D. 800-899
[单选题]SMTP工作在OSI哪一层()
A. 会话层(session layer)
B. 表示层
C. 传输层
D. 应用层
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