题目内容
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 efficiency 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 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 management by integrating with customers’ existing systems, such as Open View 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. 4（）
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以下关于信息和信息化的论述中，不正确的是（）
关于网络安全，以下说法中正确的是（）
计算并填写下表IP地址111.181.21.9子网掩码255.192.0.0地址类别___41___网络地址___42___直接广播地址___43___主机号___44___子网内的最后一个可用IP地址___45___ 43（）
To compete in today’s fast-paced competitive environment, organizations are increasingly allowing contractors, partners, visitors and guests to access their internal enterprise network. These users may connect to the network through wired ports in conference rooms or offices, or via wireless access points. In allowing this open access for third parties, LANs become(1). Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to (2) activity. For many organizations, however, the operational complexity and costs to ensure safe third party network access has been prohibitive. Fifty-two percent of surveyed CISOs stated that they currently use a moat and castle" security approach, and admit that defenses inside the perimeter are weak. Threats from internal users are also increasingly a cause for security concerns. Employees with malicious intent can launch(3) of service attacks or steal (4) information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with (5) and worms acquired from unprotected public networks. Hackers masquerading as internal users can take advantage of weak internal security to gain access to confidential information. 4（）
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