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Introduction to computer lec (5)

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Samiullah Khan

This document discusses communication and telecommunication. It defines communication as the exchange of information between participants to reach understanding, and telecommunication as communication over a distance using mediums like cables, telegraphs or broadcasts. The basic elements of data communication are a sender, medium, and receiver. It describes different types of computer networks including personal area networks (PANs), local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs) that connect computers across various distances and geographic locations.

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Introduction to computer IT-101 Lecture #5 Communication, Telecommunication
Communication • The exchanging of information, ideas or news is called Communication. • Two way process of reaching mutual understanding in which participants not only exchange information but also create and share meanings.
Telecommunication • Communication over a distance by cable, telegraph, telephone, or broadcasting is called telecommunication. • Telecommunication is the process of transferring data electronically from one place to another. Data can be transferred using different medium.
• Basic elements of data communication are: 1. Sender 2. Medium 3. Receiver
Sender • The sender is the device that sends the data. It is also called Source. Example: • Computer, mobile device etc
Medium • The medium is the physical path that connects the sender and the receiver. It is used to transmit data. It is also called communication channel. Example: • Copper wire, Fiber-optic cable, air waves etc.
Receiver • The receiver is the device that accept the data. It is also called sink. Example: • Computer, Printer etc.
Method of transferring Message
Computer Networks • Computer network connects two or more autonomous computers. • The computers can be geographically located anywhere.
PAN,LAN, MAN & WAN PAN(Personal Area Network) • A computer network organized around an individual person. Personal area networks typically involve a mobile computer, a cell phone and/or a handheld computing device such as a PDA.
PAN,LAN, MAN & WAN LAN(Local Area Network): • Network in small geographical Area (Room, Building or a Campus) is called LAN (Local Area Network) • A network of computers located in the same building or different nearby buildings • Example: – Computer network of a University campus
PAN,LAN, MAN & WAN MAN (Metropolitan Area Network) • Network in a City is call MAN (Metropolitan Area Network) that is connect the LAN within the city.
PAN,LAN, MAN & WAN WAN(Wide Area Network) • A network in which computers are separated by great distances, typically across cities or even continents • May consist of several interconnected LANs Example:  The network connecting the ATM of a bank located in various cities  Internet

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Introduction to computer lec (5)

  • 1. Introduction to computer IT-101 Lecture #5 Communication, Telecommunication
  • 2. Communication • The exchanging of information, ideas or news is called Communication. • Two way process of reaching mutual understanding in which participants not only exchange information but also create and share meanings.
  • 3. Telecommunication • Communication over a distance by cable, telegraph, telephone, or broadcasting is called telecommunication. • Telecommunication is the process of transferring data electronically from one place to another. Data can be transferred using different medium.
  • 4. • Basic elements of data communication are: 1. Sender 2. Medium 3. Receiver
  • 5. Sender • The sender is the device that sends the data. It is also called Source. Example: • Computer, mobile device etc
  • 6. Medium • The medium is the physical path that connects the sender and the receiver. It is used to transmit data. It is also called communication channel. Example: • Copper wire, Fiber-optic cable, air waves etc.
  • 7. Receiver • The receiver is the device that accept the data. It is also called sink. Example: • Computer, Printer etc.
  • 9. Computer Networks • Computer network connects two or more autonomous computers. • The computers can be geographically located anywhere.
  • 10. PAN,LAN, MAN & WAN PAN(Personal Area Network) • A computer network organized around an individual person. Personal area networks typically involve a mobile computer, a cell phone and/or a handheld computing device such as a PDA.
  • 11. PAN,LAN, MAN & WAN LAN(Local Area Network): • Network in small geographical Area (Room, Building or a Campus) is called LAN (Local Area Network) • A network of computers located in the same building or different nearby buildings • Example: – Computer network of a University campus
  • 12. PAN,LAN, MAN & WAN MAN (Metropolitan Area Network) • Network in a City is call MAN (Metropolitan Area Network) that is connect the LAN within the city.
  • 13. PAN,LAN, MAN & WAN WAN(Wide Area Network) • A network in which computers are separated by great distances, typically across cities or even continents • May consist of several interconnected LANs Example:  The network connecting the ATM of a bank located in various cities  Internet