- PC - Buzz - 1 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z *

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gamut

range of possible colors

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gate

> port

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gateway

A gateway is a network point that acts as an entrance to another network. On the Internet, in terms of routing, the network consists of gateway nodes and host nodes. The computers of network users and the computers that serve content (such as Web pages) are host nodes. The computers that control traffic within your company's network or at your local Internet service provider (ISP) are gateway nodes.
In the network for an enterprise, a computer server acting as a gateway node is often also acting as a proxy server and a firewall server. Gateways also involve the use of routers and switches.

 

1) Previously used for a router (network-layer gateway) or a mail gateway (application-layer gateway).
2) Protocol converter.

 

[IT-Lex]: En fællesbetegnelse for udstyr, der kobler to datanet sammen. Da de to datanet ikke nødvendigvis består af åbne systemer, vil en gateway have omsætterfunktioner mellem de protokoller, der anvendes i de respektive net. Jo lavere i OSI's syv lag protokolkonverteringen foregår, jo mere generelt anvendelig er en gateway.
I forbindelse med OSI anbefales det, at ordet gateway kun bruges i de tre nederste lag. Begrebet protokolkonverter kan da anvendes i de resterende lag.

 

[MS-CD]: A device that connects networks using different communications protocols so that information can be passed from one to the other. A gateway both transfers information and converts it to a form compatible with the protocols used by the receiving network.

Kan arbejde på alle 7 lag i OSI modellen
Oversætter mellem forskellige protokoller -  fx mellem Ethernet og TokenRing.
Nødvendig når protokollerne over lag 3 (netværk) er forskellige.
Interface mellem fx PC og mainframe, SNA Server

 

> bridge

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Gb, GB = Gigabit, Gigabyte

ca 1 milliard (10⁹) bit, byte - præcist 1024³
> Kb, KB, Mb, MB

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GCHQ = General Communications Headquarters

Largest British intelligence and eavesdropping operation. Last week unveiled plans for expanded head quarters in Cheltenham for its 4,000 staff. Operates the other main listening station in Britain at RAF Morwenstow at cliffs on north Cornwall coast.
> COMINT

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GDI = Graphics Device Interface

Device independent graphics interface developed by Microsoft for Windows 1
Allocated a 64K GDI heap space

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GDS = Global Directory Service

> X.500

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Get2net

dansk Internetudbyder

www.get2net.dk
Hjemmesider: hjem,get2net.dk

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GIF = Graphic Interchange Format

Billedformat udviklet af CompuServe - med 8 bits (1 byte) pr billedpunkt, som derfor kan gengive 256 forskellige farver eller gråtoner. Én af disse 'farveværdier' kan angives at være 'transparent'.
På grund af det begrænsede antal farver egner GIF-formatet sig især til tegnede clipart-billeder, logoer og ikoner - men ikke til fotografier med mange nuancer (her benytter man især JPG-formatet).
GIF-billeder er komprimerede, så de ikke fylder ret meget - de benyttes derfor i Internettes html-dokumenter.
 
GIF-formatet kan indeholde en serie af billeder i den samme fil - med tidsangivelser for hvert billede, så de kan vises som en lille film:"Animerede GIF billeder" - fx
> PNG

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GIGA

udvikler og producerer meget hurtige chips til tele- og datakommunikation.

www.giga.dk
Intel køber GIGA - et selskab i NKT koncernen

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GMT = Greenwich Mean Time

> UTC

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GNOME = GNU Network Object Model Environment

GUI for Linux
> GNU

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GNU = GNU's Not Unix

En samling af gratis software for Unix samlet af FSF
> GNOME, Linux

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Gopher

TCP/IP information browser. Benytter IP-port 70.
> Veronica, Jughead, URL

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GPRS = General Packet Radio Service

En standard, som kan anvende flere mobilfrekvenser. GPRS er en pakkekoblende teknologi, dvs. at informationerne sendes i "pakker", på samme måde som på Internettet. GPRS understøtter dataoverførsler med op til 115 kilobits pr. sekund - men den faktiske hastighed afhænger af belastningen på nettet.

GPRS er velegnet til trådløs kommunikation mellem f.eks. en mobiltelefon og Internettet.

 
[TechEncyclopedia]: An enhancement to the GSM mobile communications system that supports data packets.
GPRS enables continous flows of IP data packets over the system for such applications as Web browsing and file transfer. GPRS differs from GSM's short messaging service (GSM-SMS) which is limited to messages of 160 bytes in length.
 

>UMTS

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GPS = Global Positioning System

Satellitbaseret system til positionsbestemmelse og navigering - udviklet i 1970'erne og etableret i 1980'erne af det amerikanske militær til både militær og civil anvendelse.

www.gpsworld.com/gpsworld/static/staticHtml.jsp?id=7860 : GPS Reference

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groupware

group scheduling, e-mail, team project management
ex: Microsoft Outlook, Microsoft NetMeeting, Lotus Notes, SoftArc FirstClass

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GroupWise

Novell Netware e-mail klient

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GSA = Global Mobile Suppliers Association

A membership organization comprised of suppliers of GSM products and services. Its goal is to promote GSM as the worldwide mobile communications standard.

www.gsacom.com

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GSM = Groupe Spéciale Mobile, Global System/Standard for Mobile communication

GSM blev udviklet fra 1987 af CEPT som en europæisk standard til digital mobiltelefoni. GSM er et digitalt netværk, der giver mulighed for stemme, data og fax overførsler med 9600 bps.

I dag er GSM det mest udbredte mobilsystem i verden. GSM fungerer på følgende frekvenser:
GSM 900 (Europa og Asien)
GSM 1800 (Europa, Asien og Australien)
GSM 1900 (USA, Canada samt dele af Latinamerika og Afrika).
 

[TechEncyclopedia]: A digital cellular phone technology based on TDMA that is the predominant system in Europe, but is also used around the world. Developed in the 1980s, GSM was first deployed in seven European countries in 1992. Operating in the 900MHz and 1.8GHz bands in Europe and the 1.9GHz PCS band in the U.S., GSM defines the entire cellular system, not just the air interface (TDMA, CDMA, etc.). As of 2000, there were more than 250 million GSM users, which is more than half of the world's mobile phone population.

GSM phones use a Subscriber Identity Module (SIM) smart card that contains user account information. Any GSM phone becomes immediately programmed after plugging in the SIM card, thus allowing GSM phones to be easily rented or borrowed. SIM cards can be programmed to display custom menus for personalized services.

GSM provides a short messaging service (SMS) that enables text messages up to 160 characters in length to be sent to and from a GSM phone. It also supports data transfer at 9.6 Kbps to packet networks, ISDN and POTS users. GSM is a circuit-switched system that divides each 200KHz channel into eight 25KHz time slots.

> Dualband, EDGE, GPRS, GSA, HSCSD, NMT, SIM, Tetra, UMTS

 

GSM-SMS >SMS

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GSNW = Gateway Services for NetWare

- in Windows NT 3.5 Server
> Gateway, Netware

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GTS = Global Telecom System

 

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GUI = Graphical User Interface

Grafisk bruger-grænseflade som fx i operativsystemet Windows. De tilgængelige ressourcer (programmer, dokumenter, printere o.s.v) kan aktiveres med muse-klik på grafiske ikoner.

http://toastytech.com/guis/index.html

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