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| The terms communications and telecommunications refer to what? | the transmission of data and information between two or more computers through a communications channel |
| Which is NOT an example of a computer application that relies on communications technology? | word processing |
| Which is a component of a basic communications system? | a communications device that sends and receives data |
| What type of transmission medium consists of pairs of copper wires twisted together? | twisted-pair cable |
| What does a modem allow telephone lines to do? | carry data |
| What does the term demodulation refer to? | the conversion of digital signals into analog signals |
| A local area network (LAN) consists of what? | a number of computers connected to a central computer |
| What function does a server perform? | managing a network's resources and providing a central storage space for programs and data |
| What kinds of communications channels does a wide area network (WAN) use? | microwaves, digital lines, and satellites |
| Why do schools install networks? | to share hardware and software resources |
| A smart pager, a cellular telephone, and a handheld computer are examples of what? | wireless technology |
| Which is NOT a service provided by the Internet? | netiquette |
| What function does a host perform? | stores and transfers data and messages on high-speed communications lines and provides network connections for additional computers |
| What does a network backbone do? | handles most communications activity on the Internet |
| What does a packet contain? | data, recipient and origin information, and sequencing details |
| What is a domain name? | a text version of a computer address |
| What is a Web page? | an electronic document on the Web that can contain multimedia elements |
| What term describes the set of tags that defines the placement and format of text, graphics, video and sound on a Web page? | hypertext markup language (HTML) |
| In what ways can a user keep track of Web pages he or she has visited? | through the use of a history list or a bookmark list |
| What is a streaming audio filbeing transferred from one electronic location to anothere? | a file that allows users to listen to sound as it downloads from the Internet onto their personal computers |
| What is file transfer protocol? | an Internet standard that allows users to exchange files with other computers on the Internet |
| How can a user participate in a newsgroup discussion? | by sending a message to a newsgroup |
| What is a news server? | a computer that stores and distributes newsgroup messages |
| What is the term used to describe hardware and software designed to restrict access to data on a network? | a firewall |
