Establishing VNC Connections

Most typical Mac users who are connecting to another Mac use Screen Sharing. You check the box under System Preferences → Sharing for Screen Sharing, and boom, you're connected with the right credentials. But, there's more to this if you are trying to remotely (and graphically) access a Mac from Windows or Linux, you may be using antiquated connection protocols, which in a production environment can be insecure to standards.

Allow VNC connections with a remote password. This only allows for an 8 character password.

System Preferences → Sharing → Screen Sharing

System Preferences → Sharing → Remote Management