1.某计算机系统由下图所示的部件构成,假定每个部件的千小时可靠度为R,则该系统的千小时的可靠度为 ( D ) 。
2.以下IP地址中,属于网络 201.110.12.224/28 的主机IP是( B )。
A.201.110.12.224
B.201.110.12.238
C.201.110.12.239
D.20 1.110.12.240
3.某公司局域网使用DHCP动态获取10.1.0.1/24网段的IP地址,某天公司大量终端获得了192.168.1.0/24网段的地址,可在接入交换机上配置( B )功能杜绝该问题再次出现。
A.dhcp relay
B.dhcp snooping
C.mac-address static
D.arp static
4.一台运行 OSPF 路由协议的路由器,转发接口为 100Mbps,其 cost 值应该是( A )。
A.1
B.10
C.100
D.1000
5.能够容纳 200 台客户机的 IP 地址段,其网络位最长是( D )位。
A.21
B.22
C.23
D.24
6.建立一个家庭无线局域网,使得计算机不但能够连接因特网,而且WLAN内部还可以直接通信,正确的组网方案是 ( C ) 。
A、AP+无线网卡
B、无线天线+无线MODEM
C、无线路由器+无线网卡
D、AP+无线路由器
7.GVRP定义的四种定时器中缺省值最小的是( A )。
A.Hold 定时器
B.Join定时器
C.Leave定时器
D.LeaveAll定时器
8.下面列出了路由器的各种命令状态,可以配置路由器全局参数的是 ( C ) 。
A、router﹥
B、router#
C、router (config)#
D、router(config-if)#
9.Network firewalls are security devices used to stop or mitigate( A ) access to private networks connected to the lnternet, especially intranets. The only traffic allowed on the network is defined via firewall ( B )-any other traffic attempting to access the network is blocked. Network firewalls sit at the ( A ) line of a network, acting as a communications liaison between internal and external devices, When properly configured, a firewall allows users to access any of the resources they need while simultaneously keeping out unwanted accesses. In addition to limiting access to a protected computer and network, a firewall can ( A ) all traffic coming into or leaving a network, and manage remote access to a private network through secure authentication certificates and logins. ( B ) firewalls examine every packet that passes through the network and then accept or deny it as defined by rules set by the user.
A.Unauthorized
B.authorized
C.normal
D.frequent
A.Ports
B.policies
C.commands
D.status
A.Front
B.back
C.second
D.last
A.Reply
B.block
C.log
D.encrypt
A.Application-layer
B.Packet filtering
C.Circuit-level
D.Proxy server
10.在Windows网络操作系统通过域模型实现网络安全管理策略。下列除 ( C ) 以外都是基于域的网络模型。在一个域模型中不允许包括 ( A ) 。
(1)A、单域模型
B、主域模型
C、从域模型
D、多主域模型
(2)A、多个主域控制器
B、多个备份域控制器
C、多个主域
D、多个服务器