A loop that accumulates a total as it reads each number from a series is often said to keep a(n) __________.

Which of the following is NOT a key component of a social network?

A) Most profile pages include some form of blog, discussion forum, or chat room so that friends can communicate with the person profiled. B) For most social networks, the user's profile page serves as the "home base" for most activities. C) Many social networks include various means of user-to-user communication, including private email and one-to-one instant messaging. D) Social networks constantly use new technology or means of communication to stay competitive.

How does single sign-on increase security?

A. It decreases the number of accounts required for a subject. B. It helps decrease the likelihood that users will write down their passwords. C. It provides logging for each system that it is connected to. D. It provides better encryption for authentication data.