IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP地址

【名词&注释】

路由器(router)、子网掩码(subnet mask)、数据包(packet)、配置文件(configuration file)、通配符(wildcard)、专用线路(dedicated line)、十进制(decimal system)、十六进制(hexadecimal system)

[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP地址所在子网的子网号为（）

A. 192.168.50.32
B. 192.168.80.64
C. 192.168.50.96
D. 192.168.50.71

查看答案&解析查看所有试题

学习资料：

[单选题]通配符掩码和子网掩码之间的关系是（）。

A. 两者没有什么区别
B. 通配符掩码和子网掩码恰好相反
C. 一个是十进制^{(decimal system)}的，另一个是十六进制^{(hexadecimal system)}的
D. 两者都是自动生成的

[单选题]当在一个接口上使用ipaccess-group99in命令时，以下哪条关于所引用访问控制列表的描述是正确的（）

A. 这个列表是编号型扩展ACL，检查离开接口的数据包
B. 这个列表是命名的扩展ACL，检查进入接口的数据包
C. 这个列表是编号型标准ACL，检查进入接口的数据包
D. 这个列表是命名的标准ACL，检查离开接口的数据包

[单选题]路由器的配置文件startup-config存放在()里

A. RAM
B. ROM
C. FLASH
D. NVRAM

[多选题]网络中经常使用DDN服务，请选出DDN的优点（）

A. 传输质量高
B. 接入方式灵活
C. 偷占带宽
D. 使用虚电路
E. 专用线路^{(dedicated line)}

[多选题]The Ezonexam network administrator wants to ensure that only a single web server can connect to pot Fa0/1 on a catalyst switch. The server is plugged into the switch's Fast Eth. 0/1 port and the network administrator is about to bring the server online. What can the administrator do to ensure that only the MAC address of this server is allowed by switch port Fa0/1? (Choose two)

A. Configure port Fa0/1 to accept connections only from the static IP address of the server
B. Configure the MAC address of the server as a static entry associated with port Fa0/1
C. Employ a proprietary connector type on Fa0/1 that is incomputable with other host connectors
D. Configure port security on Fa0/1 to reject traffic with a source MAC address other than that of the server
E. Bind the IP address of the server to its MAC address on the switch to prevent other hosts from spoofing the server IP address

[单选题]What is the purpose of the spanning-tree algorithm in a switched LAN?

A. To provide a monitoring mechanism for networks in switched environments.
B. To manage VLANs across multiple switches.
C. To prevent switching loops in networks with redundant switched paths.
D. To segment a network into multiple collision domains.
E. To prevent routing loops in networks.

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