Final answer:
WPA3 encryption is the most effective countermeasure to protect against sniffing attacks on a wireless network, providing secure encryption that makes deciphering captured data packets challenging without encryption keys.
Step-by-step explanation:
Best Countermeasure to Sniffing on Wireless Networks
When concerned about sniffing attacks on your wireless network, one of the most effective countermeasures you can implement is WPA3 encryption. Unlike increasing signal strength, which simply extends the range of your wireless signal or disabling SSID broadcasting, which can be bypassed, or using MAC address filtering that can be spoofed, WPA3 provides robust security through advanced encryption. WPA3 encryption ensures that even if a sniffer captures data packets from your network, deciphering the information within will be significantly challenging without the correct encryption keys.