Final answer:
Filtering can augment some of the security limitations of WEP in a wireless LAN by restricting access to specific devices based on their MAC addresses and regularly changing the WEP key. Increasing the encryption strength of WEP and broadcasting the SSID do not directly address the security limitations of WEP.
Step-by-step explanation:
Filtering can augment some of the security limitations of Wired Equivalent Privacy (WEP) in a wireless local area network (LAN) by a) restricting access to specific devices based on their MAC addresses. By filtering the MAC addresses, only devices with authorized addresses can connect to the network, thus protecting against unauthorized access. This helps to compensate for the weak encryption provided by WEP.
b) Increasing the encryption strength of WEP is not achieved through filtering. WEP is known to have vulnerabilities, and increasing the encryption strength would require using a more secure protocol, such as WPA or WPA2.
c) Regularly changing the WEP key is another measure to enhance the security of WEP. By changing the key at regular intervals, it reduces the window of opportunity for potential attackers to gain access to the network.
d) Broadcasting the SSID of the network does not directly address the security limitations of WEP. Broadcasting the SSID can make the network more visible and convenient for users to connect, but it does not enhance the encryption or security of WEP.