Final answer:
To minimize SSID overlap and electromagnetic interference, avoid placing access points close to sources of interference. Instead, use appropriate tools and planning to ensure optimal placement.
Step-by-step explanation:
In addressing the question of what should NOT be done to restrict SSID overlap and stop electromagnetic interference when determining where to place access points and surveying a site for signal strength, it is advised not to install access points near the source of interference. This practice can exacerbate the problem by increasing signal noise and disrupting the performance of the wireless network. Instead, it is essential to use a site survey tool, analyze the signal strength in different areas, and carefully plan the number of access points to balance coverage and minimize overlap.