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Sample essay topic, essay writing: Wlans - 1108 words

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.. the wireless network is to achieve a high level of connectivity. Total benefits of implementing the WLAN technology offer the benefits of mobility, reduced installation time, and decreased cost. Many colleges are finding that wireless LANs save on costs, especially in networking new or renovated buildings. For example, the University of Southern Mississippi installed 300 wireless access points rather than rewire buildings on campus.

The school is only paying approximately $9,000 per building for wireless, rather than $75,000 per building for a wired system (Jim Geier). The savings comes not just from less wiring but also the corresponding reduction in installation labor. Some tangible benefits from this Cost/Benefits Analysis:"X Return on Investment (ROI) is 8%"X 33% decrease in operating cost"X 25% increase in employee productivityTechnical FeasibilityMobility: The mobile user or student can move from classroom to classroom with their WLAN-enabled computer and still access the Internet, file servers, library resources, and so forth. This mobility can extend to conference rooms or study rooms used by faculty or students in the course of their planning and study.Installation speed and simplicity: The use of wireless in older buildings can save considerable money and challenges posed by retrofitting to support networking. The wired LAN infrastructure can be minimized and used to support the necessary VLAN connections and Access Points in the classrooms.Installation flexibility: Flexibility is offered in both the networking of dedicated computer labs and the use of mobile computer labs

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This can allow any classroom to become a computer lab, as needed, with the use of computer carts. The primary requirement for a mobile lab situation is a computer 'drop' to which the access point on the mobile cart can be attached.Reduced cost of ownership: While mid- to high-end Access Points are not inexpensive, the overall investment in the wireless infrastructure is, in the long run, less expensive than retrofitting cables into old buildings. And by not having fixed positions, rooms can be adapted for different uses in the future without writing off the cost of the wiring; this is especially true of computer labs where the number of drops would be substantial.Scalability: The wireless LAN could start off small, perhaps with a mobile computer lab, and then grow in size and complexity as needed and when funds become available. Likewise, devices like Access Points can be upgraded when the instructional needs and infrastructure dictate. The cost of current Access Points can be migrated to other locations when new equipment is purchased.

This especially applies to computer labs.Live Emulation TestingCommunication Machinery Corporation (CMC) of Santa Barbara, Calif., (Eric Griffith, 2005)has expanded the capabilities of its EmulationEngine Wi-Fi network testing product by adding a new version that supports user scalability testing under 802.11g networks. Other versions of the product support 802.11a or 11b networks only. 11g support is only found in the new dual-band version for 802.11a/g/b. It won't run the three types simultaneously, only one at a time.The EmulationEngine hardware is the size of a standard access point with dual dipole antenna on the back. Dave Swan, the vice president of sales and marketing at CMC, describes the product's emulation simply as being 'seen as 64 laptops with 802.11 NICs.' The company calls each of these faux users -- each seen as if with a full MAC address, IP address, etc.

-- as a virtual station, or vSTA. Swan sees three types of end-users that would want or need to do emulation testing: developers and network engineers that design products, deployment users such as system integrators, and the enterprise support side, such as IT managers and the like.This WLAN stress tester is controlled by connecting it to a PC via Ethernet. The interface is access by running a Telnet session or via a Web browser. The generation of the vSTA 'users' is all done at the radio level. The EmulationEngine can do internal tests, by asking the vSTAs to send iterated pings, or externally --when coupled with a traffic generator such as NetIQ's Chariot , IP data traffic can be to forwarded to the vSTAs, so the access point and switches on the WLAN will see 64 streams of generated traffic. InstallationAs with any other project, the planning of a WLAN installation involves establishing a schedule and assigning resources.

For example, you may need two installers working over a period of six weeks to install 150 access points and only one installer for a couple days for a smaller network with five access points. You'll also need to accomplish some up front coordination to ensure that the installation is completed on schedule. The access points will tie back to switches via Ethernet; therefore, you need to communicate with the people responsible for supporting the existing Ethernet systems if they already exist. Each access point requires a 10Mbps or 100Mbps Ethernet connection, depending on the design of the WLAN. In addition, it will likely be safer and optimum in terms of performance to separate the access points from the rest of the corporate network via a router or virtual LAN(VLAN) .

Just be sure to discuss all of this with the support staff for effective integration into the existing system.When considering the installation schedule, think about the time of installation. The best approach is to install access points and the distribution system during operational downtimes. For example, don't attempt going full speed ahead with an installation in retail stores in November or December because of the holiday-related activities. Also avoid installations in office complexes during the daytime when there are lots of people milling around. In larger facilities, you'll likely come across locked doors leading to locations where you need to install access points or cabling.

As a result, coordinate access to these locked rooms before getting too far along. It's best to actually have a phone number (preferably a cell phone) of someone who can get you into rooms at the last minute if necessary.DocumentationOur documentation includes requirements, specification, architectural and detailed design documents. In using system documentation, we identified and documented system configuration, functions, and capabilities of the wireless network. We have created documentation for network administrators, and users.The documentation for the network administrator shows them how to troubleshoot the wireless network and configure new locations.Training Training for the end user requires no user interaction at all in most cases; users will be automatically placed on the correct network. However, the network administrators will attend intense training to implement and support the WLAN. SupportBerean Institute has hired an outsource company to support our wireless network for a two year contract.

However, the network administrators will serve as immediate back back-up when problems.

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