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VNC allows remote access and cross-platform control connections between computers. The tool also comes with different viewers for Android, Chrome, and iOS.
Whereas no servers are needed for the connection process, the simple peer-to-peer architecture may require network configuration in advance. The free version does not encrypt communication, as it is intended for individual private use only.
VNC authentication is nonetheless granted through IP identification and a password of your own. Another drawback is the need to install the same application on the other computer too. On the other hand, the good thing comes from the fact that it is compatible with almost all operating systems available.