Assuming an individual has taken all of the steps to keep their internet connection private, such as using encryption, VPN, and secure protocols, the best option to browse the web privately is to prevent information about browsing activities from being stored on the personal device. This can be achieved by using the private or incognito mode of the web browser, which does not save the browsing history, cookies, cache, or other temporary files on the device. This can help protect the individual's privacy from other users who may have access to the device, or from malware that may compromise the device. The other options are not as good as preventing information from being stored on the device. Preventing information from being stored in the cloud may not be possible or effective, as some web services or applications may still collect or store the user's data on their servers, regardless of the user's preferences. Storing information in the cloud or on the device may expose the user's browsing activities to unauthorized access or disclosure, unless the data is encrypted and protected by strong authentication and authorization mechanisms. References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 5: Communication and Network Security, page 608. Official (ISC)2 CISSP CBK Reference, Fifth Edition, Chapter 5: Communication and Network Security, page 609.

The main difference between a network-based firewall and a host-based firewall is that a network-based firewall controls traffic passing through the device, while a host-based firewall controls traffic destined for the device.