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Unit 3 Assignment 1 WLAN Analysis

Decent Essays
Scenario 1, Scenario 2, and Lab Assessment Questions
Every school is unique in their needs, but their requirements for a WLAN are the same. To be able to effectively prepare a wireless LAN infrastructure, there are a few key points that need to be considered first: pre-implementation procedures, who/what users will utilize WLAN resources, the applications that will be used, what devices will access the network, what areas will need wireless coverage, what information will be sent across the WLAN, and full security.
An RF design, evaluate and select a WLAN architecture, a site survey, and capacity and coverage are the issues that need to be addressed before implementing a WLAN. Because there are limitations and performance issues to consider
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This can be a building, air conditioning unit, vault, large safe, large machines, or metal partitions.
• Stationary objects – metal boxes, building material, rock walls, fireplaces, etc., that can obstruct, deflect, or block the RF signals.
• Shared bandwidth – all wireless devices compete for available bandwidth. As the number of wireless nodes increase, the bandwidth can be reduced, which decreases the performance of the network.
Evaluate and select a WLAN architecture. Wired Ethernet frames are converted to wireless RF signals through access points (APs). The two main access points are autonomous APs and lightweight APs.
• Lightweight APs also known as thin cannot be configured or used on their own and have very few advanced features. Tasks are offloaded to an upstream server: generating encryption keys, acting as a VPN gateway, or re-routing traffic for cross-network mobility.
• Autonomous APs have features such as, VLAN tagging and SNMP-based management. The tasks listed above do not need to be offloaded, they can be performed on a fat AP
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This will help determine the amount of access points needed and placement of each. The network requirements need to be defined and configured before the site survey is performed to ensure there is optimal coverage and capacity. These steps should be done when conducting a site survey:
• Gather all relevant documentation, including facility diagrams, drawings/blueprints, wiring plans, and any information identifying locations of computer systems, existing network infrastructures, power outlets, etc.
• Perform a walk-through to inspect the area that the WLAN is going to be installed, and not any features that may cause network problems.
• Use a site survey tool and special software to determine the radio coverage and interference patterns in the WLAN areas. The survey results will help to identify locations for the access points and antennas, and how to position them.
• Identify where additional antennas, access points, or repeaters may be needed to provide even levels of coverage and capacity.
• Locate all electrical outlets and determine if any existing or planned electrical systems could generate interference. Determine if backup power will be required to safeguard against power loss or
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