Thousands of special-interest websites are devoted to topics such as health, diet, and fitness; entertainment news and movie reviews; home decorating and repair; museums; or genealogy.

Which of the following is NOT true about circles?

A) When you add someone to one of your circles, you are not automatically added to that person's circles. B) Google+ is built around the concept of "circles" of friends. C) Instead of dumping all your friends into one giant bucket, you group similar friends into several smaller buckets that Google calls circles. D) Google+ circles define two-way relationships.

The part of the wireless network that is responsible for sending and receiving radio waves is the _______

Fill in the blank(s) with correct word