Final answer:
Wireless telephones and cellular telephones may cause interference with 802.11b wireless networks, while wireless televisions and television remote controls do not typically cause interference.
Step-by-step explanation:
Among the consumer electronics listed, wireless telephones and cellular telephones may cause interference with 802.11b wireless networks. This is because both wireless telephones and cellular telephones operate on frequencies that can overlap with the frequencies used by 802.11b networks, leading to signal interference. Wireless televisions and television remote controls, on the other hand, do not typically operate on frequencies that would interfere with 802.11b networks.