UNC stands for Uniform Naming Convention which is a Microsoft standard for identifying shared resources on a network. For example, if you share a folder for public access then someone else on your network can access that folder by typing the UNC path at the command prompt.
The format of a UNC path is: \\<servername>\<sharename>\<directory>, where these placeholders represent the following types of names:
As an example, the following are all valid UNC paths:
\sallyf\baddies \sallyf\baddies\snip \sallyf\baddies\snap \sallyf\baddies\snerp \sallyf\baddies\snerp\batter \sallyf\baddies\snerp\bath
...assuming the following file structure:
c: (c-drive on a computer called "sallyf") |-- temp |-- mistakes |-- baddies (shared as "baddies") |-- snip |-- snap |-- snerp |-- batter |-- bath