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Index
 What is Networking?
 Networking
 Advantages of Computer Network
 Disadvantages of Computer Network
 Classification of area by their geography
 Local Area Network (LAN)
 Wide Area Network (WAN)
 Metropolitan Area Network (MAN)
 Distinguish between LAN, WAN, MAN
What is Networking?
A computer network is defined as the interconnection of two or more computers. It is done to enable
the computers to communicate and share available resources.
Application:
 Sharing of resources such as printer.
 Sharing of expensive software's and database.
 Communication from one computer to another computer.
 Exchange of data and information among users via network.
 Sharing of information over geographically wide areas.
Networking
Computer networks have opened up an entire frontier in the world of computing called the client /
server model.
Request
Response
Advantages of Computer Network
 Increased speed
 Reduce cost
 Improved security
 Centralized software managements
 Electronic mail
 Flexible access
Disadvantages of Computer Network
 High cost of installation
 Requires time for administration
 Failure of server
 Cable faults
Classification of Area by their Geography
NETWORK
LAN
MANWAN
Local Area Network (LAN)
 LAN is a network which is designed to operate over a small physically area such as an office, factory
or a group of buildings.
 LAN's are easy to design and troubleshoot.
 Exchange of information and sharing of resources becomes easy because of LAN.
 In LAN all machines are connected to a single cable.
 Different types of topologies such as star, tree, bus, ring, etc. can be used.
 It is usually a privately owned network.
Local Area Network (LAN)
Wide Area Network (WAN)
 When network spans over a large distance or when the computers to be connected to each other
are at widely separated locations a local area network cannot be used. A wide area network (WAN)
is installed.
 The communication between different users of WAN is established using leased telephone lines,
satellite links and similar channels.
 It is cheaper and more efficient to use the phone network for the link.
 Most WAN networks are used to transfer large blocks of data between its users.
Wide Area Network (WAN)
Metropolitan Area Network (MAN)
 It is in between LAN & WAN technology that covers the entire city.
 It uses similar technology as LAN.
 It can be a single network such as cable TV network, or a measure of connecting a number of LAN's
or a large network so that resources can be shared LAN to LAN as well as device to device.
Metropolitan Area Network (MAN)
Distinguish between LAN, WAN, MAN
PARAMETERS LAN WAN MAN
Ownership of network Private Private or Public Private or Public
Geographical area
covered
Small Very large Moderate
Design and maintenance Easy Not easy Not easy
Communication medium Coaxial cable PSTN or satellite links
Coaxial cable, PSTN,
optical fibre cable,
wireless
Bandwidth Low High Moderate
Data rates(speed) High Low Moderate
THANK YOU
By – Debabrata Halder
IX – B
6

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Computer Networking

  • 2. Index  What is Networking?  Networking  Advantages of Computer Network  Disadvantages of Computer Network  Classification of area by their geography  Local Area Network (LAN)  Wide Area Network (WAN)  Metropolitan Area Network (MAN)  Distinguish between LAN, WAN, MAN
  • 3. What is Networking? A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources. Application:  Sharing of resources such as printer.  Sharing of expensive software's and database.  Communication from one computer to another computer.  Exchange of data and information among users via network.  Sharing of information over geographically wide areas.
  • 4. Networking Computer networks have opened up an entire frontier in the world of computing called the client / server model. Request Response
  • 5. Advantages of Computer Network  Increased speed  Reduce cost  Improved security  Centralized software managements  Electronic mail  Flexible access
  • 6. Disadvantages of Computer Network  High cost of installation  Requires time for administration  Failure of server  Cable faults
  • 7. Classification of Area by their Geography NETWORK LAN MANWAN
  • 8. Local Area Network (LAN)  LAN is a network which is designed to operate over a small physically area such as an office, factory or a group of buildings.  LAN's are easy to design and troubleshoot.  Exchange of information and sharing of resources becomes easy because of LAN.  In LAN all machines are connected to a single cable.  Different types of topologies such as star, tree, bus, ring, etc. can be used.  It is usually a privately owned network.
  • 10. Wide Area Network (WAN)  When network spans over a large distance or when the computers to be connected to each other are at widely separated locations a local area network cannot be used. A wide area network (WAN) is installed.  The communication between different users of WAN is established using leased telephone lines, satellite links and similar channels.  It is cheaper and more efficient to use the phone network for the link.  Most WAN networks are used to transfer large blocks of data between its users.
  • 12. Metropolitan Area Network (MAN)  It is in between LAN & WAN technology that covers the entire city.  It uses similar technology as LAN.  It can be a single network such as cable TV network, or a measure of connecting a number of LAN's or a large network so that resources can be shared LAN to LAN as well as device to device.
  • 14. Distinguish between LAN, WAN, MAN PARAMETERS LAN WAN MAN Ownership of network Private Private or Public Private or Public Geographical area covered Small Very large Moderate Design and maintenance Easy Not easy Not easy Communication medium Coaxial cable PSTN or satellite links Coaxial cable, PSTN, optical fibre cable, wireless Bandwidth Low High Moderate Data rates(speed) High Low Moderate
  • 15. THANK YOU By – Debabrata Halder IX – B 6