| A | B |
| ARPA | Advanced Research Projects Agency |
| Backbone | The central heart of the Internet is called __________. |
| Internet | Consists of information, people, and billions of interconnected computer networks throughout the world. |
| Internet Protocol (IP) | Four sets of numbers ranging from 0-255 to identify the network ID, node, and host ID. |
| Protocol | Standard set of rules that computer network devices follow when transmitting data. |
| Internet addresses | Unique address to identify business and/or individuals. |
| World Wide Web | Supports a collection of multimedia documents that includes text, pictures, sound, animation, and video. |
| Uniform Resource Locator (URL) | A unique address given to every page. |
| Intranet | A private network that is for a very specific group of users. |
| Directory | Searches for information by selecting categories of subject matter. |
| Search engines | Search for information by typing one or more words. |
| Site-specific | Searches for information on the Web site currently visiting. |
| Metasearch engines | Uses multiple search engines simultaneously to look up sites that match keywords. |