____________________ computing involves reducing the environmental waste generated when using a computer.

An organization wants to perform maintenance on any of its web servers without affecting the service availability during a scheduled change window. Which of the following network devices would be required to provide this functionality?

A. Router B. Forward proxy C. Load balancer D. Firewall

Assume proper includes have been executed, but no using directive or declaration. Write a definition of an iterator for a vector of ints that is initialized to point to the first member of the vector vec.

What will be an ideal response?