● 某网络结构如下图所示。在Windows操作系统中,Server1通过安装 (28) 组创建 Web 站点。PC1 的用户在浏览器地址栏中输入 www.abc.com 后无法获取响应页面管理人员在 Windows 操作系统下可以使用 (29) 判断故障发生在网络 A 内还是网络外。如果使用 ping 61.102.58.77 命令对服务器 Server1 进行测试,响应正常,则可能出的问题是 (30) 。
(28)
● 关于项目管理甘特图的结构,下列选项中合理的是(70) 。
(70)
● WLANs are increasingly popular because they enable cost-effective connections among people and applications that were not possible in the past. For example, WLAN-based applications can enable fine-grained management of supply (71) to improve their efficiency and reduce (72). WLANs can also enable entirely new business processes. To cite but one example, hospitals are using WLAN-enabled point-of-care (73) to reduce errors and improve overall patient care. WLAN management solutions provide a variety of other benefits that can be substantial but difficult to measure. For example, they can protect corporate data by preventing (74) through rogue access points. They can improve overall network management by integrating with customers’ existing systems. Fortunately, it isn’t necessary to measure these benefits to justify investing in WLAN management solutions, which can quickly pay for themselves simply by minimizing time- (75) deployment and administrative chores.
(71)
● IEEE802.11 定义了无线局域网的两种工作模式,其中的(65)模式是一种点对点连接的网络,不需要无线接入点和有线网络的支持。IEEE802.11g 的物理层采用了扩频技术,工作在(66)频段。
(65)
● (68)是错误的网络设备选型原则。
(68)
● 下面关于网络工程需求分析的论述中,正确的是(69) 。
(69)
● 快速以太网物理层规范100BASE-TX 规定使用(64) 。
(64)
● IEEE 802局域网中的地址分为两级,其中LLC 地址是(63) 。
(63)
● 下面是显示交换机端口状态的例子:
2950# show interface fastEthernet0/1 switchp
Name: fa0/1
Switchport: Enabled
● 以太网的 CSMA/CD 协议采用坚持型监听算法。与其他监听算法相比,这种算法的主要特点是 (62)
(62)
● 路由器Console端口默认的数据速率为(58) 。
(58)
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