你可能感兴趣的试题

某DNS服务器配置的资源记录如图7-9所示。

其中，优先级别最高的邮件交换器是（）。

某公司内部服务器S1部署了重要的应用业务，该业务只允许特权终端PC1访问。为了保证通信安全，郭工在基于WindowsServer2003操作系统的服务器S1上配置如图7-12所示的IPSec策略。
针对图7-12，以下说法中错误的是（）。

Web站点的“默认网站属性”窗口如图7-8所示。如果要限制某些IP地址访问该网站，则需要在（）选项卡中进行配置。

可以用数字信号对模拟载波的不同参量进行调制，图7-4所示的调制方式称为（）。

电子邮件系统的工作原理如图7-7所示。其中，①、②处所使用的应用协议分别是（）。

图7-2是一个软件项目的活动网络图，其中顶点表示项目里程碑，边表示包含的活动，边上的权重表示活动的持续时间（单位：天），则项目总工期为（）天。

计算机各功能部件之间的合作关系如图7-1所示。假设图中虚线表示控制流，实线表示数据流，则部件a、b和c分别表示（）。

某集团公司的部分网络拓扑结构如图7-5所示。当前路由器R1只有一条到达子网10.20.1.0/24的路由。为使R1能够将IP分组正确地路由到图7-5中所有子网，则在R1中需要增加的一条路由（目的网络，子网掩码，下一跳地址）是（）。

如图7-3所示的树形文件系统中，方框表示目录，圆圈表示文件，“/”表示路径的分隔符，“/”在路径之首表示根目录。

在图7-3中，假设当前目录是A1，“pr”表示打印命令，那么打印根目录中的文件tf1的正确命令是（）。

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP)．RIP is the canonical example of a routing protocol built on the (1) algorithm．Routing protocols in internet works differ slightly from the idealized graph model．In an internet work，the goal of the routers to forward (2) to various networks．
Routers running RIP send their advertisement about cost every (3) seconds．A router also sends an update message whenever an update from another router causes it to change its routing table．
Routing protocols use different techniques for assigning (4) to individual networks．Further, each routing protocol forms a metric aggregation in a different way．RIP takes the simplest approach，with all link costs being equal (5) ．Thus it always tries to find the minimum hop route．Valid distances are 1 through 15．This also limits RIP to runing on fairly small networks．

某公司采用代理服务器接入Internet，网络拓扑结构如图7-10所示。
在。host1的DOS命令窗口中，运行routeprint命令显示其路由信息，得到的结果如图7-11所示。
该公司host1所配置的IP地址和子网掩码分别是 (1) 。若host1要访问Internet，根据默认路由，数据报文经接口1发送到IP地址为 (2) 的网关。接口3的IP地址为 (3) 。

设计一个网络时，分配给其中一台主机的IP地址为192.168.1.120，子网掩码为255.255.255.240。则该主机的主机号是 (1) ；可以直接接收该主机广播信息的地址范围是 (2) 。

在图7-6所示的OSPF协议多区域结构中，路由器 (1) 为主干路由器； (2) 为区域边界路由器。

T1载波把24条信道按 (1) 方式复用在一条1.544Mbps的高速信道上，每条话音信道的有效数据传输速率是 (2) 。

在图7-6所示的OSPF协议多区域结构中，路由器 (1) 为主干路由器； (2) 为区域边界路由器。

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP)．RIP is the canonical example of a routing protocol built on the (1) algorithm．Routing protocols in internet works differ slightly from the idealized graph model．In an internet work，the goal of the routers to forward (2) to various networks．
Routers running RIP send their advertisement about cost every (3) seconds．A router also sends an update message whenever an update from another router causes it to change its routing table．
Routing protocols use different techniques for assigning (4) to individual networks．Further, each routing protocol forms a metric aggregation in a different way．RIP takes the simplest approach，with all link costs being equal (5) ．Thus it always tries to find the minimum hop route．Valid distances are 1 through 15．This also limits RIP to runing on fairly small networks．

设计一个网络时，分配给其中一台主机的IP地址为192.168.1.120，子网掩码为255.255.255.240。则该主机的主机号是 (1) ；可以直接接收该主机广播信息的地址范围是 (2) 。

某公司采用代理服务器接入Internet，网络拓扑结构如图7-10所示。
在。host1的DOS命令窗口中，运行routeprint命令显示其路由信息，得到的结果如图7-11所示。
该公司host1所配置的IP地址和子网掩码分别是 (1) 。若host1要访问Internet，根据默认路由，数据报文经接口1发送到IP地址为 (2) 的网关。接口3的IP地址为 (3) 。

T1载波把24条信道按 (1) 方式复用在一条1.544Mbps的高速信道上，每条话音信道的有效数据传输速率是 (2) 。

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP)．RIP is the canonical example of a routing protocol built on the (1) algorithm．Routing protocols in internet works differ slightly from the idealized graph model．In an internet work，the goal of the routers to forward (2) to various networks．
Routers running RIP send their advertisement about cost every (3) seconds．A router also sends an update message whenever an update from another router causes it to change its routing table．
Routing protocols use different techniques for assigning (4) to individual networks．Further, each routing protocol forms a metric aggregation in a different way．RIP takes the simplest approach，with all link costs being equal (5) ．Thus it always tries to find the minimum hop route．Valid distances are 1 through 15．This also limits RIP to runing on fairly small networks．

某公司采用代理服务器接入Internet，网络拓扑结构如图7-10所示。
在。host1的DOS命令窗口中，运行routeprint命令显示其路由信息，得到的结果如图7-11所示。
该公司host1所配置的IP地址和子网掩码分别是 (1) 。若host1要访问Internet，根据默认路由，数据报文经接口1发送到IP地址为 (2) 的网关。接口3的IP地址为 (3) 。

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP)．RIP is the canonical example of a routing protocol built on the (1) algorithm．Routing protocols in internet works differ slightly from the idealized graph model．In an internet work，the goal of the routers to forward (2) to various networks．
Routers running RIP send their advertisement about cost every (3) seconds．A router also sends an update message whenever an update from another router causes it to change its routing table．
Routing protocols use different techniques for assigning (4) to individual networks．Further, each routing protocol forms a metric aggregation in a different way．RIP takes the simplest approach，with all link costs being equal (5) ．Thus it always tries to find the minimum hop route．Valid distances are 1 through 15．This also limits RIP to runing on fairly small networks．

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP)．RIP is the canonical example of a routing protocol built on the (1) algorithm．Routing protocols in internet works differ slightly from the idealized graph model．In an internet work，the goal of the routers to forward (2) to various networks．
Routers running RIP send their advertisement about cost every (3) seconds．A router also sends an update message whenever an update from another router causes it to change its routing table．
Routing protocols use different techniques for assigning (4) to individual networks．Further, each routing protocol forms a metric aggregation in a different way．RIP takes the simplest approach，with all link costs being equal (5) ．Thus it always tries to find the minimum hop route．Valid distances are 1 through 15．This also limits RIP to runing on fairly small networks．