WiFi

Correct Answer: MU-MIMO

MU-MIMO, or Multi-User, Multiple-Input, Multiple-Output is the best choice for improving WiFi performance in a high-density environment, like a large business conference room with many attendees. MU-MIMO technology allows a WiFi router to communicate with multiple devices simultaneously, thus significantly increasing overall network speed and efficiency. This technology is especially effective in high-density environments where many devices are competing for bandwidth On the other hand, Channel Overlapping is generally not recommended, as it can contribute to WiFi interference and degrade network performance rather than improving it. AP Isolation is a networking technique that prevents WiFi users from seeing each other and sharing resources, but it won't increase WiFi performance in a high-density environment. Lastly, TKIP or Temporal Key Integrity Protocol is an encryption method used to secure wireless networks, but it doesn't directly improve WiFi performance.

Correct Answer: Change the WiFi Channel

The best solution to tackle the interference problem of the WiFi signal strength due to microwave ovens is to 'Change the WiFi Channel'. Microwave ovens typically operate at a frequency of 2.4GHz, the same as WiFi channel 1-11. Therefore, changing the WiFi channel can often help to reduce this interference. Utilizing a tool to analyze WiFi channel congestion can aid in this process. The other options are incorrect because: 'Increase WiFi router's power' might boost the signal strength, but it wouldn't necessarily negate the interference caused by the microwave; 'Switch to WEP encryption' affects data security not signal interference; and 'Reduce DHCP leasing time' only affects how often IP addresses are renewed and has no effect on signal interference.

Correct Answer: WPA3

The question is about the best encryption method for a WiFi network to ensure maximum security. The correct answer is WPA3. This is because WPA3 is the latest and most secure WiFi encryption standard. It's been designed to replace the older WPA2, providing stronger protection against password guesses and increased security configurations. The other options are not as secure. WEP is the oldest and least secure of all the presented standards and can be easily cracked with modern techniques. WPA, while better than WEP, is also not as secure as WPA3. WPA2 was an improvement over WPA, but its security vulnerabilities led to the development of WPA3. So, to secure her small business's WiFi network most effectively, the business owner should opt for WPA3.