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| Two wires are twisted together to form a pair; the pair form a balanced circuit. The |
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| twisting prevents interference problems, STP provides protection against external |
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| crosstalk. |
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| A cable that wires a pin to its equivalent pin. This cable connects two dissimilar |
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| Ethernet cable |
| devices, for example, a data terminal equipment (DTE) device and a data |
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| communications equipment (DCE) device. A straight through Ethernet cable is the most |
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| commonly used Ethernet cable. |
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| SUA |
| Single User Account. Your system's SUA feature allows multiple user Internet access |
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| for the cost of a single ISP account. See also NAT. |
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| Subnet Mask |
| The subnet mask specifies the network number portion of an IP address. Your device |
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| will compute the subnet mask automatically based on the IP Address that you entered. |
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| You do not need to change the computer subnet mask unless you are instructed to do |
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| so. |
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| T |
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| TCP |
| Transmission Control Protocol is a |
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| the reliability of message delivery. It verifies that messages and data were received. |
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| Terminal |
| A device that allows you to send commands to a computer somewhere else. At a |
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| minimum, this usually means a keyboard, display screen and some simple circuitry. |
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| Terminal |
| Software that pretends to be (emulates) a physical terminal and allows you to type |
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| Software |
| commands to a computer somewhere else. |
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| TFTP |
| Trivial File Transfer Protocol is an Internet file transfer protocol similar to FTP (File |
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| Transfer Protocol), but it is scaled back in functionality so that it requires fewer |
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| resources to run. TFTP uses the UDP (User Datagram Protocol) rather than TCP |
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| (Transmission Control Protocol). |
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| Twisted Pair |
| Two insulated wires, usually copper, twisted together and often bound into a common |
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| sheath to form |
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| subscriber's terminal or telephone and the PBX or the central office. |
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| U |
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| UDP |
| User Datagram Protocol. DP is a connectionless transport service that dispenses with |
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| the reliability services provided by TCP. UDP gives applications a direct interface with |
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| the Internet Protocol (IP) and the ability to address a particular application process |
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| running on a host via a port number without setting up a connection session. |
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| UNIX |
| A |
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Glossary | M |