Final answer:
Jeff should change the channel on his wireless access point to reduce interference from nearby networks; this is different from MAC filtering, SSID broadcasting, and encryption, which do not directly address interference.
Step-by-step explanation:
To reduce interference from the other wireless networks, Jeff should configure the channel of his wireless access point. Wireless networks operate on different channels within certain frequency bands, such as 2.4 GHz and 5 GHz. Configuring the wireless access point to use a channel that is different from those used by the nearby networks can help minimize interference and improve the reliability of Jeff's wireless connection.
Options such as MAC filtering, SSID broadcasting, and encryption do not directly address interference issues. MAC filtering is used to control access to the network, SSID broadcasting pertains to the visibility of the network, and encryption secures the data being transmitted over the network.