To improve the security of a wireless network, which measure is recommended?

Using MAC address filtering is a recommended security measure for improving the security of a wireless network. This technique involves configuring the wireless access point or router to only allow devices with specified MAC (Media Access Control) addresses to connect to the network. By doing this, even if someone attempts to access the network, they would need to know the exact MAC addresses of permitted devices to gain access, thus creating an additional layer of security.

It is important to note that MAC address filtering should not be the sole method relied upon for securing a wireless network, as skilled attackers can spoof MAC addresses. However, it can serve as a helpful layer when used alongside other security measures.

In contrast, enabling WEP encryption is considered inadequate for modern security standards, as WEP has numerous vulnerabilities that can be exploited easily. Disabling SSID broadcast might deter casual users from connecting, but it does not provide robust security since the SSID can still be detected by network sniffing tools. Increasing the router range does not inherently enhance security and could allow more unauthorized access if the network signal extends beyond the desired area. Therefore, MAC address filtering is a proactive approach to restricting access to a known list of devices, thereby enhancing wireless network security.