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Communication       &Telecommunication
Information/Data/Signals  Information               Signal                  Data                001011101                 ...
Communication,   The exchanging of information, ideas or news is called    Communication.   Communication is the activit...
Telecommunication   Telecommunication is the process of transferring data    electronically from one place to another. Da...
Basic elements of data communication are:1.   Sender2.   Medium3.   ReceiverSender     The sender is the device that sends...
Basic elements of data communication…Medium  The medium is the path that connects the sender and the  receiver. It is used...
Basic elements of data communication…Receiver  The receiver is the device that accept the data. It is  also called sink.Ex...
Communication Channels   The path through which data is transmitted from    one place to another is called channel. It is...
Communication Channels1.Wired /Physical/Guided   In guided media, communication devices are   directly connected with each...
Communication Channels2.Wireless/ Unbounded/Unguided Media   In unguided media, communication devices   communicate with e...
Modes of CommunicationData is transferring by three ways Simplest   Half –Duplex   Full -Duplex
SimplestFeatures:     a) Unidirectional      b) Send-only or Receive-only devices      c) Sender is unaware about the stat...
Half -DuplexFeatures:        a) Two-way communication but not simultaneously.        b) At a moment it is unidirectional o...
Full-duplexFEATURES:        a) Also known as Duplex Mode        b) Communicates in both directions simultaneously.        ...
Computer Networks Network  Network   is a group of two or more computers and     devices connected via transmission media...
Types of Network  PAN(Personal Area Network)  LAN (Local Area Network)  MAN (Metropolitan Area Network)  WAN(Wide Area...
Types of Network PAN:      A computer network organized around an    individual person. Personal area networks typically  ...
Types of Network  LAN   That  interconnects computers in a limited area Network or a    small geographical Area (Room, Bu...
MAN    A computer network that usually spans a city or a large    campus. A MAN usually interconnects a number of    LANs...
WAN  Any network that links across metropolitan, regional,  or national boundaries. Business and government  entities with...
Communication
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Communication

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Transcript of "Communication"

  1. 1. Communication &Telecommunication
  2. 2. Information/Data/Signals Information Signal Data 001011101 2
  3. 3. Communication, The exchanging of information, ideas or news is called Communication. Communication is the activity of conveying meaning- ful information. Technology includes non-telephone oriented systems such as radio-based communications systems for aircraft, ships, etc. Two way process of reaching mutual understanding in which participants not only exchange of information but also create and share information..
  4. 4. Telecommunication Telecommunication is the process of transferring data electronically from one place to another. Data can be transferred using different medium. Technology includes telephone networks(non-mobile&mobile) telex networks, etc Communication over a distance by cable, telegraph, telephone, or broadcasting is called telecommunication.
  5. 5. Basic elements of data communication are:1. Sender2. Medium3. ReceiverSender The sender is the device that sends the data. It is also called Source.Example: Computer, mobile device etc
  6. 6. Basic elements of data communication…Medium The medium is the 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. 7. Basic elements of data communication…Receiver The receiver is the device that accept the data. It is also called sink.Example: Computer, Printer etc.
  8. 8. Communication Channels The path through which data is transmitted from one place to another is called channel. It is also known as communication media. Or A medium through which a message is transmitted to its intended audience, such as print media or broadcast (electronic) media. Have Two types:1.Wired Media2.Wireless Media
  9. 9. Communication Channels1.Wired /Physical/Guided In guided media, communication devices are directly connected with each other by using some physical media like wires. Some examples of guided media. Twisted Pair Coaxial Cable Fiber Optics
  10. 10. Communication Channels2.Wireless/ Unbounded/Unguided Media In unguided media, communication devices communicate with each other through air or space.Example. Microwave Communication Satellite Broadcast Radio Cellular Radio
  11. 11. Modes of CommunicationData is transferring by three ways Simplest Half –Duplex Full -Duplex
  12. 12. SimplestFeatures: a) Unidirectional b) Send-only or Receive-only devices c) Sender is unaware about the status of transmission. d) Rarely used for data communication.In simplex mode the communication can take place inone direction. The receiver receives the signal from thetransmitting device. In this mode the flow of informationis Uni.-directional.e.g. Television, or Radio and Data from computer toPrinter. Sender Receiver
  13. 13. Half -DuplexFeatures: a) Two-way communication but not simultaneously. b) At a moment it is unidirectional only. c) Can alternately send and receive data. c) Transmission direction can be changed whenrequired. d) Delay factor (Line Turnaround Time) is associated.In half-duplex mode the communication channel is used in bothdirections, but only in one direction at a time. Thus a half-duplex linecan alternately send and receive data.e.g. Half-duplexSender is a two-party system such as a "walkie- system Receivertalkie" or Receiver OR or Sender
  14. 14. Full-duplexFEATURES: a) Also known as Duplex Mode b) Communicates in both directions simultaneously. c) Line Turnaround time is eliminated. d) Much efficient mode.In full duplex the communication channel is used in bothdirections at the same time.There is no need to switch from sending to receive mode like inhalf duplex.e.g. This mode of communication is the telephone line Sender & Receiver AND Receiver & Sender
  15. 15. Computer Networks Network  Network is a group of two or more computers and devices connected via transmission media for communications purpose.  The computers can be geographically located anywhere.  Through Network we can share hardware resources, information etc.
  16. 16. Types of Network  PAN(Personal Area Network)  LAN (Local Area Network)  MAN (Metropolitan Area Network)  WAN(Wide Area Network)
  17. 17. Types of Network PAN: 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. WPAN (wireless personal area network) is a PAN carried over wireless network technologies such as Bluetooth, Wireless USB etc. The reach of a WPAN varies from a few centimeters to a few meters.
  18. 18. Types of Network LAN  That interconnects computers in a limited area Network or a small geographical Area (Room, Building or a Campus) is called LAN (Local Area Network)  such as a home, school, computer laboratory, or office building using network media. Example: Computer network of a University campus
  19. 19. MAN A computer network that usually spans a city or a large campus. A MAN usually interconnects a number of LANs using a high-capacity backbone technology, such as fiber-optical links, and provides up-link services to WAN and the Internet. orA MAN is a large computer network that cross the campus but within the city. Its scope falls between a WAN and LAN. It connects more then one LAN. Just like Medical College and Main campus etc.
  20. 20. WAN Any network that links across metropolitan, regional, or national boundaries. Business and government entities with WANs to relay data among employees, clients, buyers, and suppliers from various geographical locations. or A network in which computers are separated by great distances, typically across cities or even continents. May consist of several interconnected LANsExample: The network connecting the ATM of a bank located in various cities Internet
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