NETWORKS #2

NETWORKS #2

1. COMMON TYPE OF NETWORKS

   • STAR NETWORKS EACH DEVICE OR COMPUTER IS CONNECTED BY HUB OR SWITCH
   • BUS NETWORKS COMPUTER OR DEVICE CONNECTED TO A CENTRAL LINE
   • RING NETWORKS THERE ARE THE LESS POPULAR
   • TREE NETWORKS HAS A CENTRAL LINE CONNECTED TO STAR NETWORKS
   • LOCAL AREA NETWORK IT IS PUT MOSTLY IN SMALL AREA LIKE BUILDINGS

2. NETWORK SECURITY

   • ENCRYPTION IS THE CONVERTION OF THE DATA INTO A CODE BY SCRAMBLING IT OR ENCORDING IT
   • PASSWORDS MOSTLY ARE ASKED TO BE TYPE TWICE BECAUSE OF THE VERIFICATION CHECK. THERE IS A LIMIT OF TRIES AT THE TIME OF PUTTING YOUR PASSWORD
   • USER ID TO DEFINE THE PRIVELEGE OF AN ADMINISTRATOR. HE CAN DELETE PASSWORD OR NCHANGE IT ETC

3. NETWORK DEVICES

   • ROUTERS ARE OFTEN USED TO CONNECT THE LAN TOGETHER AND ALSO CONNECT THEM TO THE INTERNET
   • BRIDGES ARE DEVICES THAT CONNECT ONE LAN TO ANOTHER LAN THAT USES THE SAME PROTOCOL
   • SWITCHES THERE ARE SIMILAR TO HUBS BUTARE MORE EFFICIENT IN THE WAY THEY DISTRIBUTE DATA
   • NETWORK HUBS ITS MAIN TASK IS TO RECIEVE INFORMATION FROM ONE PORT AND DISTRIBUTE IT TOA LL OF THE PORTS
   • MODEMS DEVICE WHICH CONVERTS A COMPUTER DIGITAL SIGNAL INTO AN ANNALOGUE SIGNAL OVER AN EXISTING TELEPHONE LINE
   • HTTP PROXY SERVERS SPECIAL TYPE OF SERVER THAT ACT AS A BUFFER BETWEEN A LAN AND A WAN

4. THE INTERNE WORLDWIDE CONNECTION OF NETWORKS

   • ACCESING THE INTERNET THERE ARE THRRE WAYS OF ACCESING THE INTERNET BY DIALING UP INTERNET ACCES BY CABLE INTERNET ACCES AND BYDIGITAL SUSCRIBER LINE
   • WEBSITES MILLIONS OF WEB PAGES AND WEB SITES. A WEB CONSITS OF A TEXT A PICTURE SOUNDS ANIMATION AND VIDEO

5. WIRELESS LANS THEY PROVIDE YOU NETWORK WITHOUT A WIRE

   • WI FI ANY SYSTEM ITS POSSIBLE TO CONNECT TO THE NETWORK
   • BLUETOOH IS TO SHARE WIRELESS NETWORK BETWEEN MOBILES AND OTHER DEVICES
   • WIDE AREA NETWORKSARE A NUMBER OF LAN CONNECTED TOGETHER THROUGH A MODEMOR EITHER A ROUTER

6. INTRANET IS A COMPUTER BASED ONINTERNET TECHNOLOGY THAT IS DESIGNED TO MEET THE INTERNAL NEEDS FOR SHARING INFORMATION

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