The last element in a sequence can always be accessed with subscript _________ .

Which of the following is not a new feature of IPv6?

a. IPsec. b. More emphasis on broadcasts. c. Uses multicasts. d. All the above are new features.

To create a negative character class that matches any character not in the class, preface the list of characters with the _____ symbol.

A. ^ B. # C. & D. *