Wireless Networking

Correct Answer: Set up a separate guest wireless network.

The best strategy for a small shop owner to provide Wi-Fi to customers without compromising the security of the company's internal network would be to 'Set up a separate guest wireless network'. This ensures that even if the guest network is compromised in some way, the company's internal network remains unharmed because they are isolated from each other. The other options are not as secure. Enabling WEP on the company's wireless network is not a strong defense as WEP is an older security protocol that can be easily cracked by most hackers. Disabling wireless access point broadcast can merely hide the network from casual users but it doesn't provide strong security. It is not difficult for a hacker to discover hidden networks. Finally, using a MAC address whitelist can provide some level of security, but it would not be practical for a public Wi-Fi service as it would require manually adding each customer's device MAC address to the whitelist, and that doesn't prevent those with the knowledge from changing or spoofing their MAC address.

Correct Answer: Signal interference due to physical barriers

Signal interference, such as physical barriers, can weaken Wi-Fi signals and directly affect the connection speed. Low DHCP lease time, weak Wi-Fi passwords, SSID confusion, and rogue access points don't cause such signal drops or slow connections in specific corners as described.

Correct Answer: Use multiple access points on non-overlapping channels

Implementing multiple access points on non-overlapping channels will help balance the load among different access points and improve overall network performance and user experience.