WLANs WPANs

Assignment of Care-of Address Before the home network can forward packets to the remote network, it must know the appropriate care-of address. With Mobile IP, there are two methods to assign a care-of address: • With the first method, a ... [full story]

Creating a Schedule The schedule indicates the element of timing in a project, making it possible for the project manager to coordinate work activities. The schedule and WBS are the basis for selecting and coordinating resources, as well as the ... [full story]

Developing a Resource Plan for an Enterprise-wide Wireless LAN The next step for Debra, the project manager developing the project plan and feasibility study for the wireless LAN, is to assign resources for the project. To accomplish this, she had ... [full story]

Developing a Budget As part of the decision to begin a project, managers might have performed an economic analysis and allocated a specific amount of funding for the project. Thus, the project team might need only to validate and refine ... [full story]

Periodic Activities Periodically, the team should check the status of the project, perform technical interchange meetings, and report progress to upper management. The following list explains each of these activities: • Status checks—For most projects, a weekly or biweekly status ... [full story]

Enhancing Communication During the execution of the project, take steps to maximize the flow of information among team members when determining requirements, designing the system, and performing installations. The problem with many project organizations is that they operate in a ... [full story]

Requirements Analysis Steps Incomplete or missing requirements are the major reasons for unsuccessful projects, resulting in 60–80% of system defects that eventually surface late in the development phase or after delivery to the users. These system defects are very time-consuming ... [full story]

Eliciting Information The objective of eliciting information is to gather as many facts as you can relating to each of the requirement types. This information will enable you to define each of the requirements during a later step. The following ... [full story]

Reviewing User Needs It’s imperative that you determine the needs of potential end users before designing or deploying a wireless LAN system. The most effective method of reviewing the needs of potential users is to interview them. It’s generally not ... [full story]

Reviewing Existing Systems User needs are only part of the requirements; existing systems also portray important requirements. Reviewing existing systems helps you to define the system interface and operational support. If you’re implementing a wireless LAN for a specific company, ... [full story]

Reviewing the Environment To determine environmental requirements, look at the conditions in which the network will operate. Gather information by interviewing company facility managers, and visually inspect areas where the wireless network will operate. For example, the obvious unseen hindrance ... [full story]

Defining Requirements After gathering information, you’re ready to define the requirements that will provide the basis for the design. To define the requirements, perform these steps: 1. Determine potential requirements 2. Validate and verify the requirements 3. Baseline the requirements [full story]

Developing a Work-Breakdown Structure (WBS) for an Debra, the project manager developing the project plan and feasibility study for the wireless LAN, received acceptance of the project scope from upper management of the manufacturing company. She is now ready to ... [full story]

Developing a Work Breakdown Structure To reach the goals of the project, plan a series of activities that produce the end product with a minimum amount of time and money. The development of a work-breakdown structure (WBS) is a good ... [full story]

Developing a Project Scope for an Enterprise-wide Wireless LAN An auto parts manufacturing company based in Atlanta, Georgia, has nine distribution centers located throughout the United States. As the manufacturing company produces the parts, it ships them to the distribution ... [full story]

Registration After receiving its new care-of address, the mobile node (or foreign agent) registers it with the home agent. This establishes a link (also referred to as a tunnel) between the foreign and home networks. For security purposes, the mobile ... [full story]

Tunneling and Encapsulation Mobile IP transports packets back and forth between the home and foreign networks via a tunnel. The tunnel has two endpoints: one at the home agent IP address and the other at the careof address (either of ... [full story]

Connectivity Software The radio card, access point, and communications software provide lower midlevel connections, but another higher level of functionality is necessary to map the application software, keyboard, display, and peripherals of the appliance to the application software or database ... [full story]

Connectivity Software The radio card, access point, and communications software provide lower midlevel connections, but another higher level of functionality is necessary to map the application software, keyboard, display, and peripherals of the appliance to the application software or database ... [full story]

Terminal Emulation The idea behind terminal emulation is to make the appliance appear as a terminal to application software running on a host-based operating system, such as UNIX and AS/400. For example, you need virtual terminal (VT) emulation running on ... [full story]

Direct Database Connectivity Direct database connectivity encompasses application software on the appliance (the client) that interfaces directly with a database located on a server. With this configuration, the software on the appliance provides all application functionality. Figure 6.17 illustrates the ... [full story]

Middleware Wireless network middleware is an intermediate software component generally located on the wired network between the wireless appliance and the application or data residing on the wired network (refer to Figure 6.19). The overall goal of middleware is to ... [full story]

Managing a Wireless LAN Implementation In most cases, organizations accomplish work in functional groups, which perform parts of an operation that are continuous and repetitious. As the system administrator for a client/server system, for example, you might perform daily backups ... [full story]

Establishing Project-Management Principles The Project Management Institute (PMI) defines project management as “the art of directing and coordinating human and material resources throughout the life of a project.” Project management primarily consists of planning, monitoring, and controlling the execution of ... [full story]

Planning a System Project Planning is an important part of any activity. It provides a time at the beginning of a project to think about what could go wrong and to visualize solutions that will keep the project on the ... [full story]

Identifying Project Scope Before determining project tasks, staffing, and creating the schedule and budget, you must first define the project’s scope, which provides a basis for future project decisions. The project scope gives a project team high-level direction, allowing an ... [full story]

Determining Potential Requirements The first step in defining requirements is to identify potential requirements by specifying each requirement using the information gathered during interviews, review of documents, and inspections. You can accomplish this by doing the following: • Conducting a ... [full story]

Assessing Constraints As part of the requirements definition, you should identify which of the requirements are constraints. Figure 7.6 illustrates the effects of constraints on solution alternatives. Constraints are usually requirements dealing with money, regulations, environment, existing systems, and culture. ... [full story]

Documenting Requirements To support the remaining phases of the project adequately, be sure to document the requirements clearly. Without good documentation, requirements can become unclear as time passes and memories lapse, and the handover of project information from person to ... [full story]

Environmental Requirements Environmental requirements state conditions such as room temperature/humidity, presence and intensity of electromagnetic waves, building construction, and floor space, all of which could affect the operation of the system. In most cases, you should perform a site survey ... [full story]

Scalability Requirements Scalability requirements indicate the capability to include additional applications and users on the wireless network beyond the initial requirements through the addition of applicable hardware and software. A wireless LAN generally must provide scalability to support the growing ... [full story]

Operational Support Requirements Operational support requirements define the elements needed to integrate the system into the existing operational support infrastructure. For example, you should require the inclusion of the Simple Network Management Protocol (SNMP) if current network-monitoring stations require SNMP. ... [full story]