Ruby scripts can run directly on all of the following operating systems except ____.

What is a RADIUS Server?

A) This is used in high-security applications to limit access to administrative accounts. B) This used with WEP for remote users to prevent authorized network access. C) This is used for remote users to prevent unauthorized users from connecting to the network. D) None of these answers are correct.

Write a program that uses nested loops to display the following lines

``` 1 2 4 6 2 2 4 6 3 2 4 6 4 2 4 6 ```