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basic network details

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8/11/2008
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PRESENTED BY GROUP-2 WHAT IS MEANT NETWORKING GROUP OF COMPUTERS CONNECTED TOGETHER BY MEANS OF TRANSMISSION MEDIA INORDER TO COMMUNICATE BETWEEN EACH OTHER AND SHARE IS KNOWN AS NETWORKING. HOW COMMUNICATION IS DONE? 1. COMMUNICATION IS DONE USING SET OF STANDARD PROTOCOLS. 2. SOME OF THE WIDELY USED PROTOCLOS ARE TCP/IP HTTP TELNET FTP… WHAT IS MEAN BY PROTOCOL? PROTOCOL IS A SET OF STANDARD RULES TO BE FOLLOWED WHILE COMMUNICATING BETWEEN THE COMPUTERS. WHAT IS THE NEEDS OF PROTOCOLS IN EARLY DAYS WHEN ARPANET INTRODUCED BY U.S MILITARY EACH AND EVERY ORGANIZATION FOLLOWED DIFFERENT SET OF PROTOCOLS,IT RESULTED IN DIFFICULTY BETWEEN SHARING AND COMMUNICATING WITH OTHER NETWORKS. SO THAT THE COMMON SET OF PROTOCOLS WAS INTRODUCED. IP ADDRESS IP ADDRESS IS USED TO IDENTIFY THE SYSTEM IN THE NETWORK. IP ADDRESS IS A 32 BIT ADDRESS IP VER.6 IS 64 BIT ADDRESS CLASSES OF IP: CLASS A: 0-126 CLASS B: CLASS C: CLASS D: 128-191 192-223 CLASS F: SCIENTIFIC AND RESEARCH PURPOSE FORMAT OF IP ADDRESS  IF IP ADDRESS IS A CLASS-A TYPE: 10.1.1.50 NET –ID HOST –ID IF IP IS A CLASS-B TYPE: 128.1.1.30 NET-ID HOST-ID IF IP IS A CLASS-C TYPE: 192.168.1.10 NET-ID HOST-ID   BASIC THINGS TO BE KNOW?  WHY IP ADDRESS  WHY SUBNET  WHY GATEWAY ADDDRESS  WHY DNS  IS IT POSSIBLE TO GIVE MORE THAN ONE IP ADDRESS IN A SYSTEM NETWORK LAYERS OSI-OPEN SYSTEM INTERCONNECTION APPLICATION LAYER THE APPLICATION ENTITIES LAYER THAT CONTAINS CONTROL APPLICATION APPLICATION PROCESS THROUGH INTERACTIONS CALLED APPLICATION LAYER PROTOCOLS. PRESENTATION LAYER IT IS USED TO CONTROL THE TRANSFORMATION OF DATA AS THEY PASS BETWEEN THESE SYSTEMS TO ENSURE THAT THE EXCHANGE OF DATA IS MEANINGFUL TO BOTH SYSTEMS. SESSION LAYER IT PROVIDES SUPPORT FOR SESSION CONNECTION BETWEEN OPEN SYSTEM. TRANSPORT LAYER IT IS RESPONSIBLE FOR MAINTAINING SERVICE FOR THE USER NETWORK LAYER THE ROUTING NETWORK FUNCTIONS LAYER FOR HANDLES DATA THE MOVING FROMONE OPEN SYTEM TO ANOTHER. DATA LINK LAYER DATA LINK LAYER DIVIDES DATA TRAFFIC INTO TRANSMISSION PACKETS OR FRAMES. PHYSICAL LAYER IT HAS THE DIRECT INTERFACE WITH THE PHYSICAL MEDIA.IT SUPPORTS POINT TO POINT AND MULTI POINT CONNECTIONS. TYPES OF NETWORK LAN :: USED TO CONNECT COMPUTERS IN SAME LOCATION INTERNET(GLOBAL NETWORK) USED TO CONNECT CITY TO CITY IT IS CONNECTED USING SATELLITE WAN:: MAN:: SAN:: CONNECTION TYPES  PEER TO PEER CONNECTION  CONECTING USING SWITCH PEER TO PEER CONNECTION: CONECTING A SYSTEM WITH ANOTHER SYSTEM DIRECTLY. CONNECTING USING SWITCH: CONNECTING MORE THAN TWO SYSTEMS CONNECTING MEDIA UTP CABLE(CAT 5): UTP CABLE AS 4 PAIR OF WIRES WHICH IS TWISTED TO EACH OTHER. UTP CABLE(CAT 6): NOW A DAYS CAT 6 CABLES OR MOSTLEY USED . RJ 45 CONNECTOR: RJ-45 IS A CONNECTOR WHICH IS LIKE AS A TELEPHONE JACK USE TO CONNECT THE CABLES WITH THE NETWORK ACRD. COLOUR CODING THE NETWORK CABLE  PEER TO PEER: ONE END WHITE ORANGE ORANGE WHIT GREEN BLUE WHITE BLUE GREEN WHITE BROWN BROWN ANOTHER END WHITE GREEN GREEN WHITE ORANGE BLUE WHIT BLUE ORANGE WHITE BROWN BROWN COLOUR CODING THE NETWORK CABLE • CONNECTING USIG SWITCH: ONE END WHITE ORANGE ORANGE WHIT GREEN BLUE WHITE BLUE GREEN WHITE BROWN BROWN ANOTHER END WHITE ORANGE ORANGE WHITE GREEN BLUE WHITE BLUE GREEN WHITE BROWN BROWN SOME NETWORK DEVICES  HUB  SWITCH  BRIDGE  ROUTER  BROUTER USED TO CONNECT LOCAL NETWORK USED AS A ADSL ROUTRE AND NETWORK BOOSTER USED TO CONNECT TWO NETWORKS WITH DIFFERENET CLASS OF IP ADDRESS COMBINATION OF BRIDGE +ROUTER  GATEWAY USED TO CONNECT MORE NO OF NETWORKS WITH DIFFERENT IP AND DIFFERENT PROTOCOLS. LAN TOOPOLOGY  BUS TOPOLOGY  RING TOPOLOG  STAR TOPOLOGY  MESH TOPOLOGY USES SWITCH AND UTP USES COAXIAL CABLES USES BOTH COAXIAL AND UTP NETWORK OS  CLIENT SUPPORTED  DOS  WINDOWS 95  WINDOWS 98  WINDOWS 2000  WINDOWS XP  WINDOWS VISTA  UNIX AND LINUX  SUN SOLARISES  MAC NETWORK OS  SERVER SUPPORTED  WINDOWS 2000 SERVER  WINDOWS 2003 SERVER  WINDOWS 2007 SERVER  LINUX  SUN SOLARISES  MAC WHEN A PC ACTS AS A ACTUAL SERVER? A PC ACTS AS SERVER WHEN IT IS INSTALLED WITH SERVER OS ,ADS IS CONFIGURED AND DOMIN IS ACTIVATED. IF THE ADS IS NOT CONFIGURE SERVER ACTS AS ONLY A WORKGROU PC…. WHAT IS A SIMPLE NETWORK? A NETWORK IS SAID TO BE A SIMPLE NETWORK WHEN THERE IS NO CENTRALIZED DATA ACCESS,IN THIS TYPE OF NETWORK NO NEED FOR A DEDICTAED SERVER AND ANY ONE CAN ACCESS ANY SYSTEMS WITHOUT ANY RIGHTS IN THE NETWORK. WHAT IS A PERFECT NETWORK? IF IS NETWORK HAS A DEDICATED SERVER AND ONLY IF DOMAI IS CONFIGURED IT IS SAID TO BE PROPER SERVER,THE DATA ACCESS IS CENTRALIZED AND WE CAN GIVE RIGHTS FOR EACH AND EVERY USE,RS IN THE NETWORK . SOME TIPS WHILE NETWORKING  SELECT THE PROPER IP CLASS ACCORDING TO THE NO OF SYSTEMS  NO DIFFRENT CLASS OF IP ADDRESS MUST BE IN A SAME NETWORK  THE WORKGROUP NAME OR THE DOMAIN NAME MUST BE COMMON TO ALL  IF IT IS A LAN IT THE CABLE LENGTH SHOULD NOT EXCEED ABOVE 100 METERS  MUST GIVE ACCESSING RIGHTS IN FIREWALL IF FIRE WALL IS INSTALLED .  CABLES MUST BE STRUCTURE USING A BACKBONE.  AVOID ELECTRIC LINES NEARER THE NETWORK CABLE. QUERIES PLEASE?
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