● 某项目制定的开发计划中定义了3个任务,其中任务A 首先开始,且需要3周完成,任务 B 必须在任务A 启动 1 周后开始,且需要2 周完成,任务 C 必须在任务 A 完成后才能开始,且需要2周完成。该项目的进度安排可用下面的甘特图 (6) 来描述。
● 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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