A VPN ____ aggregates hundreds or thousands of multiple connections together.

If a variable uses more than one byte of memory, for pointer purposes its address is

a. the address of the last byte of storage b. the average of all the addresses used to store that variable c. the address of the first byte of storage d. the address of the second byte of storage e. None of these

Which of the following statements is true?

a. The UML models a parameter of an operation by listing the parameter name, followed by a colon and the parameter value between the parentheses after the operation name. b. The UML indicates an operation’s return type by placing a colon and the return value after the parentheses following the operation name. c. UML class diagrams do not specify return types for operations that do not return values. d. Declaring instance variables public is known as data hiding or information hiding.