To protect confidential company information from hackers while at a work conference, you must be sure to use which of the following networks when accessing the Internet at a hotel?

A) Extranet
B) Intranet
C) Wireless network
D) Virtual private network

The best choice is a virtual private network (VPN), which creates a secure, encrypted connection between your computer and the company's network. This ensures that any data transmitted over the Internet is protected from potential hackers or eavesdroppers. Using a wireless network or even an extranet may still leave your information vulnerable to interception or theft. An intranet, on the other hand, is a private network within a company's firewall and is only accessible to authorized personnel, so it would not be useful in this scenario.