Which is the proper way to determine how many characters are in the string variable named str?

How would you cloak Excel files (.xls) saved inside the website folder?

What will be an ideal response?

Which of the following statements about SSL VPNs is true?

A. It requires no end user software to set up and use. B. Connections originate from an Internet accessible URL. C. When authenticated users have access to the corporate network as if they are physically connected to it. D. All the above.