Exam Essentials

Use a systematic approach to troubleshooting. Reference the OSI model and start with Layer 1 before moving on to higher layers when eliminating potential causes for problems. Avoid making multiple changes at once as it is difficult to distinguish which change had which effect when multiple changes occur in unison.

Be able to validate coverage. Ensure the coverage area is receiving a quality signal that meets the design requirements. Use site survey software to analyze and spot problematic areas.

Understand the importance of quality of service. Be able to identify different methods commonly used to give preference to high priority traffic. Understand what happens on both the wireless and wired side of QoS markings.

Know how to troubleshoot security. Be able to troubleshoot the common failures that can occur during 802.1X/EAP exchanges.