VNC
VNC or Virtual Network Computing Is a remote connection service, It is similar to the RDP Franchise but making a vnc server is going to be alot harder
What is the purpose of VNC's?
Its not really like RDP's but how that works is you can remotely access a work desktop from home (or other location), or to allow remote technical support people to take over a computer for support activities.
TL;DR: You can takeover computers with no permission.
Dartz have made their own VNC Resolver By just stealing half of the vncs from different resolvers.
Ill show you different types of VNC's
Hows the security? Well, In my opinion, I would say that the security is actually pretty nice, its alot protective than RDP's services. And its faster by speed and responsiveness.
Pros: Its alot better than RDP, its well creative and had some extra security to it
Cons: Need to add a bit more security like verification, user and passwords and permissions.