单选题

WLANs are increasingly popular because they enable cost-effective connections among people, applications and data that were not possible, or not cost-effective, in the past. For example, WLAN-based applications can enable fine-grained management of supply and distribution (1) to improve their efficienty and reduce (2) .WLANs can also enable entirely new business processes. To cite but one example, hospitals are using WLAN-enabled point-of-care applications to reduce errors and improve overall (3) 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 (4) through rogue access points. They help control salary costs, by allowing IT staffs to manage larger networks without adding staff. And they can improve overall network mananement by integrating with customers' existing systems, such as OpenView and UniCenter. 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-consuming(5) and administrative chores. 空白处（2）应选择（）

A personel

B expenses

C overhead

D hardware

解析： 分析在过去，应用和数据难以获得或者获得的成本很高，现在，因为WLAN能使人们之间互连的性价比很高，从而得到了广泛的应用。例如，基于WLAN的应用能使供应链得到很好的管理，提高效率并减少经费开支。WLAN使新的业务流程成为可能。作为一个例子，医院正在使用基于WLAN的护理点应用，以便减少错误，改进对病人的全面护理工作。WLAN管理方案提供了一系列的其他好处，这些好处是很实在的，但是又难以度量。例如，它可以防止通过欺诈访问点的方式的入侵，以保护企业数据。WLAN允许IT团队在不增加人员的基础上管理更大的网络，从而有助于控制薪水开支。WALN通过集成客户已有的系统，如OpenView和UniCenter等，有助于加强全面网络管理。幸运的是，我们不必度量这些好处来证明对WLAN管理方案的投资是正确的，WLAN管理方案只需使耗时的部署工作和事务性工作得以最小化，就可以很快得到补偿。