computer networks- network basics
TRANSCRIPT
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New
Delhi-75Affiliated Institution of G.G.S.IP.U, Delhi
BCAComputer Networks
BCA210Network Basics
Keywords: Network, Internetworking
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
Network Definition• Set of technologies that connects
computers• Allows communication and collaboration
between users
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
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• Simultaneous access to data– Data files are shared• Access can be limited
– Shared files stored on a server– Software can be shared• Site licenses• Network versions• Application servers
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
• Shared peripheral device– Printers and faxes are common shares– Reduces the cost per user– Devices can be connected to the network– Print servers control network printing• Manage the print queue
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
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Sharing Data
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
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• Personal communication– Email• Instantaneous communication
– Conferencing• Tele conferencing• Videoconferencing• Audio-conferencing• Data-conferencing
– Voice over IP• Phone communication over network wires
The Uses of Network
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
Voice over IP
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
The Uses of a Network
• Easier data backup– Backup copies data to removable media– Server data backed up in one step
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
• Local Area Network (LAN)– Contains printers, servers and computers– Systems are close to each other– Contained in one office or building– Organizations often have several LANS
Common Network Types
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
• Wide Area Networks (WAN)– Two or more LANs connected– Over a large geographic area– Typically use public or leased lines• Phone lines• Satellite
– The Internet is a WAN
Common Network Types
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Campus Area Networks (CAN)– A LAN in one large geographic area– Resources related to the same organization– Each department shares the LAN
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Metropolitan Area Network (MAN)– Large network that connects different
organizations– Shares regional resources– A network provider sells time
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Home Area Network (HAN)– Small scale network– Connects computers and entertainment
appliances– Found mainly in the home
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TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75
Hybrid Network Types
• Personal Area Network (PAN)– Very small scale network– Range is less than 2 meters– Cell phones, PDAs, MP3 players