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To access the contents, click the chapter and section titles.
Wireless Networking Handbook
Assign meaningful names to servers and printers within the network. For example, utilize a name such as APPS1 as a name for a server containing applications. Avoid using names that associate the server to its platform type and location, which is more likely to change than the servers function. Assigning Access RightsFor each user and group, assign the proper rights to specific servers, applications, directories, and files. As a default, network operating systems assign all rights to all users. You need to change the rights assignments to limit users access to resources based upon job responsibilities. Review security requirements and assign rights to users based on their need to access certain information. Typically, you can assign a combination of the following rights to each user and group:
The proper issuance of these rights constrains users to the specific directories, files, and applications they need to access. Planning Directory StructuresA directory structure provides a framework for the installation of applications and storage of files. Start by establishing a set of drives containing common types of applications and files as follows:
Then continue by assigning subdirectories to the drives as needed. For example, you could assign a subdirectory on the F: drive for each user as follows: F:\JAROBERTS F:\JAROBERTS2 F:\JCJONES F:\SCLAUS And, the G: drive could have directories as follows for each application program: G:\WORD (for Microsoft Word) G:\EXCEL (for Microsoft Excel) Help DeskThe help desk is the central point of contact for users needing help with an application or other system-related problem. The help desk performs functions and operations as shown in figure 9.3. For instance, a user having a question or problem calls a single phone number and reaches the help desk. The help desk staff should attempt to answer the users questions or solve the problem over the phone if possible, minimizing the amount of time the user has to wait. In some cases, the user may not be able to perform his tasks until the problem is fixed. If the help desk staff cannot satisfy the users request, then the help desk person should classify the problem and hand it off to a second level of supportsuch as maintenance, engineering, or an outside consultant. For network problems, the help desk should initiate and manage a trouble ticket until the problem is resolved. The trouble ticket describes the problem and the status of the repair. The help desk should concentrate on user satisfaction. Here are some suggestions when establishing or upgrading a help desk:
Network ManagementNetwork management enables you to evaluate, plan, and control the configuration of your network. Support staff can then effectively control the network and respond faster to problems. Network management is also responsible for high-level troubleshooting of network problems, at least to the level of detail that the network management software allows. Network management software, for example, typically enables you to isolate problems to the component level, such as a cable, switch, or network interface card. Generally, maintenance people are required to drag test equipment out to the problem location to perform troubleshooting within these components. Figure 9.4 illustrates the elements of network management.
The following sections describe each of the network management elements: Performance ManagementThe goal of performance management is to make certain the network meets the performance requirements of the users. Performance management includes performance modeling and monitoring that measures elements, such as network throughput, user response times, and line utilization, to facilitate proactive control of the network. Performance ModelingPerformance modeling is the use of simulation software to predict network behavior, enabling you to perform capacity planning. With simulation, you can model the network and impose varying levels of utilization to observe the effects. A necessary component of performance modeling, though, is performance metrics, such as user activity levels. Accurate performance metrics are important because they provide a basis for the simulation; however, you must often predict metric values, increasing the potential for error. Consider the use of performance modeling on large, complex, or mission critical networks. OPNET, which is described in Chapter 8, Designing a Wireless Network, is a fully featured network simulation tool. Consider its use for simulating the performance of mission-critical networks.
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