... physical space. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. Troubleshooting Wireless LAN Installations CWNA Exam Objectives ... size that will trigger CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. MAC and Physical Layers CWNA Exam Objectives ... can cause overhead of up to 70 %, while a congested wireless network remains somewhat constant at around 50 - 55% throughput. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. Chapter...