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BASICS TUTORIAL ON PCS AND USE OF THE INTERNET
GLOSSARY OF TERMS USED IN THE PC AND INTERNET WORLD
GLOSSARY (s-t)
Safety-critical:
Scan:
Scanner:
Scroll Bar:
SCSI: See Small Computer System Interface.
SDSL: See Synchronous Digital Subscriber Line.
Searching:
Search Directory:
Search Engine:
Serial Port (COM1-4):
Server: A provider of resources, eg file servers and name servers. See also: Client, Domain Name System.
SGML: See Standard Generalised Markup Language.
Simple Mail Transfer Protocol (SMTP): A protocol, defined in STD 10, RFC 821, used to transfer electronic mail between computers. It is a server to server protocol, so other protocols are used to access the messages. See also: Electronic Mail, Post Office Protocol.
Simple Network Management Protocol (SNMP): The Internet standard protocol developed to manage nodes on an IP network. See also: Management Information Base.
Small Computer System Interface (SCSI): A standard interface that enables a computer's peripherals to communicate with the operating system.
SMTP: See: Simple Mail Transfer Protocol.
SNMP: See: Simple Network Management Protocol.
Software:
Spider:
Splash page: An introductory first page or front page that you see on some websites, it usually contains a click-through logo or message or a fancy Flash presentation with some kind of announcement. The main content and navigation of the site resides behind this page (on a home or welcome page).
Spreadsheet:
Standard Generalised Markup Language (SGML):
Stream-oriented: A type of transport service that allows its client to send data in a continuous stream. The transport service will guarantee that all data will be delivered to the other end in the same order as sent and without duplicates. See also: Transmission Control Protocol.
Stub network: A stub network only carries packets to and from local hosts. Even if it has paths to more than one other network, it does not carry traffic for other networks. See also: Backbone, Transit network.
Subnet: A portion of a network, which may be a physically independent network segment, which shares a network address with other portions of the network and is distinguished by a subnet number.
Subnet address: The subnet portion of an IP address. In a subnetted network, the host portion of an IP address is split into a subnet portion and a host portion using an address (subnet) mask. See also: Address mask, IP address, Network address, Internet (host) address.
Subnet mask: See: Address mask.
Surfing:
Synchronous Digital Subscriber Line (SDSL): A non-standard Digital Subscriber Line (DSL) (qv) service in which upload speeds are as fast as download speeds, as opposed to an Asynchronous Digital Subscriber Line (qv) in which (less-used) upload speeds are slower.
Table:
Tag::
Talk: A protocol which allows two people on remote computers to communicate (via their keyboards) in a real-time fashion. See also: Internet Relay Chat.
TCP: See: Transmission Control Protocol.
TCP/IP: Transmission Control Protocol over Internet Protocol. Common shorthand which refers to the suite of transport and application protocols which runs over IP. See also: IP, ICMP, TCP, UDP, FTP, Telnet, SMTP, SNMP.
Telephony:
Telnet: Telnet is the Internet standard protocol for remote terminal connection service.
Tera:
Token ring: A token ring is a type of LAN with nodes wired into a ring. Each node constantly passes a control message (token) on to the next; whichever node has the token can send a message. See also: Local Area Network.
Trackerball:
Transceiver: Transmitter-receiver. The physical device that connects a host interface to a local area network, such as Ethernet. Ethernet transceivers contain electronics that apply signals to the cable and sense collisions.
Transmission Control Protocol (TCP): An Internet Standard transport layer protocol. It is connection-oriented and stream-oriented, as opposed to UDP. See also: Connection-oriented, Stream-oriented, User Datagram Protocol.
Trojan horse: An invasive computer program which carries within itself a means to allow the creator of the program access to the system it has invaded allowing it to cause disruption or steal confidential data. See also: Virus, Worm.
Tunnelling: Tunnelling refers to encapsulation of a protocol (A) within another protocol (B), such that A treats B as though it were a datalink layer. Tunnelling is used to transfer data between Administrative Domains that use a protocol not supported by the Internet connecting those domains. See also: Administrative Domain.
Details updated: June 15 2010
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