Infrastructure mode and ESS
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Infrastructure mode and ESS
- An extended service set is two or more basic service sets connected by a distribution system medium.
- Usually an extended service set is a collection of multiple access points and their associated client stations, all united by a single DSM.
- The most common example of an ESS has access points with partially overlapping coverage cells
- The purpose behind an ESS with partially overlapping coverage cells is to provide seamless roaming to the client stations.
- Most vendors recommend cell overlap to achieve successful seamless roaming, although measuring cell overlap is not an exact science.
- Coverage overlap is really duplicate coverage from the perspective of a Wi-Fi client station
- An ESS topology is called colocation, and the intended goal is increased client capacity as opposed to roaming.
- Colocation is one method of providing coverage for a high density of client devices in the same area.
Reference:
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
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