SNMP: Simple Network Management Protocol. Protocol for open networking management.

static route: A route that is permanent rather than a route that is dynamically assigned by another router.

STP: Shielded Twisted Pair. Telephone wire that is wrapped in a sheath to eliminate external interference.

subnet address: The subnet portion of an IP address.

subnet mask: A number that identifies the subnet portion of a network address. so that IP addresses can be shared on a local area network.

subnet: An independent network segment, that is, it has the same network address, but its subnet address is different.

switch: A data switch connects computing devices to host computers, enabling multiple devices to share a limited number of ports. An electrical switch is a device for making, breaking, or changing the connections in an electrical circuit.

synchronous transmission: Transmission with the transmitter and receiver synchronized so that data is transmitted at a fixed rate.

synchronous: Any operation that is controlled by a clock or timing mechanism. (Compare with asynchronous).

TCP/IP: Transmission control protocol/Internet protocol, a set of protocols that govern peer-to-peer connectivity functions for local and wide area networks.

TCP: Transmission Control Protocol.

Telnet: The TCP/IP virtual terminal protocol that allows a user at one site to access a remote system at another site.

throughput: The number of bits, characters, or blocks that are able to pass through a data communication system.

training: A process where two modems try to determine the correct protocols and transmission speeds to establish a communication session.

trellis-coded modulation: Advanced error correction coding technique for forward error correction to a modulation scheme by adding an additional bit to each baud.

UDP: User Datagram Protocol. A connectionless protocol that converts data messages generated by an application into packets to be sent over IP.

UNIX: An operating system developed at AT&T Bell Laboratories.

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