Um okay, that's not a question so why even post it.
Answer:
data link layer
Explanation:
you answer is data link layer
The Boolean type is used to represent true or false values
One technical issue I had was on Windows 8.1, with the charm menu not working. The troubleshooting steps to fix it was I did CTRL+SHIFT+ESC to open task manager. I then found Windows Explorer and clicked "Reload." Then everything was fine.
Hope This Helped!