An office wants to install a Wi-Fi network.

Because the organization plans to deploy high-powered wireless access points, the next critical step is to create a heat map of the building perimeter. CompTIA Security+ SY0-701 highlights wireless heat maps as an essential design tool for identifying signal bleed, coverage overlap, dead zones, and areas where wireless signals extend beyond intended boundaries.

Stronger access points increase the risk of signal leakage outside the building, which could allow unauthorized users to attempt connections from parking lots or nearby buildings. A heat map enables the security team to visualize RF propagation and adjust power levels, antenna placement, and access point locations to minimize external exposure while maintaining internal coverage.

Deploying IPSec tunnels (B) is unnecessary for standard WLAN architectures. Enabling WPA2-PSK (C) weakens security compared to WPA3. Disabling SSH administration (D) is a hardening step but does not address wireless coverage risks.

Therefore, the correct next step in secure Wi-Fi design is A: Create a heat map of the building perimeter.