Afirewall is either software or dedicated hardware that exists between the being protected.

A firewall is either software or dedicated hardware that exists between the network and the resource being protected. this network security device monitors traffic to or from the network. It is based on set of rules about what data packets will be allowed to enter or leave a network.

universal windows platform is an open source api created by microsoft and first introduced in windows 10. the purpose of this platform is to develop universal apps that run on windows 10, windows 10 mobile, xbox one and hololens without the need to be re-written for each. it supports windows app development using c++, c#, vb.net, and xaml. the api is implemented in c++, and supported in c++, vb.net, c#, f# and javascript. designed as an extension to the windows runtime platform first introduced in windows server 2012 and windows 8, uwp allows developers to create apps that will potentially run on multiple types of devices.