Appendix F: Glossary of Network and VoIP Terms
| A designation for the type of wiring used by Ethernet networks with |
| a data rate of 10 Mbps. Also known as Category 3 (CAT 3) wiring. |
| See also data rate, Ethernet. |
| A designation for the type of wiring used by Ethernet networks with |
| a data rate of 100 Mbps. Also known as Category 5 (CAT 5) wiring. |
| See also data rate, Ethernet. |
ADSL | Asymmetric Digital Subscriber Line. The most commonly deployed |
| type of DSL for home users. The term asymmetrical refers to its |
| unequal data rates for downloading and uploading (the download |
| rate is higher than the upload rate). The asymmetrical rates benefit |
| home users because they typically download much more data from |
| the Internet than they upload. |
analog | Of data, having a form is analogous to the data’s original |
waveform | The voice component in DSL is an analog signal. |
| See also digital. |
ATM | Asynchronous Transfer Mode A standard for |
| transmission of data, text, voice, and video, widely used within the |
| Internet. ATM data rates range from 45 Mbps to 2.5 Gbps. See also |
| data rate. |
authenticate | To verify a user’s identity, such as by prompting for a password. |
binary | The “base two” system of numbers, that uses only two digits, 0 and |
| 1, to represent all numbers. In binary, the number 1 is written as 1, 2 |
| as 10, 3 as 11, 4 as 100, etc. Although expressed as decimal numbers |
| for convenience, IP addresses in actual use are binary numbers; e.g., |
| the IP address 209.191.4.240 is 11010001.10111111.00000100.1 |
| 1110000 in binary. See also bit, IP address, network mask. |
bit | Short for “binary digit,” a bit is a number that can have two values, 0 |
| or 1. See also binary. |
bps | bits per second |
bridging | Passing data from your network to your ISP and vice versa using |
| the hardware addresses of the devices at each location. Bridging |
| contrasts with routing, which can add more intelligence to data |
| transfers by using network addresses instead. The ADSL modem can |
| perform both routing and bridging. Typically, when both functions |
| are enabled, the device routes IP data and bridges all other types of |
| data. See also routing. |
broadband | A telecommunications technology that can send different types of |
| data over the same medium. DSL is a broadband technology. |
Broadcast | To send data to all computers on a network. |
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