Five Basic Concepts of Data Communication- Ist Line Confirguration

Five Basic Concepts of Data Communication o    Line Configuration o    Topology o    Transmission Mode o    Categories of networks o    Internetworks LINE CONFIGURATION "Line Configuration refers to the way two or more devices attach to a Link" A link is the physical communication path that transfers data from one device to the other. Link can be thought of as a Line drawn between two points. For communication to occur, two devices must be connected to each other using a link. Line Configurations Point-to-Point Line Configuration Dedicated  Link  between  two  devices.  Entire  Capacity  of  the  channel  is  reserved for TX B/w these two devices. Mostly point-to-point connection use wire/cable to connect with each other. But Microwave, Satellite Links can also be used Data  and  Control  information  pas  directly  between  entities  with  no  intervening agent    Examples:    TV Remote Control and TV Control Systems    Mobile Phone (when talking) and Base Station (Antenna) ™   Multipoint Line Configuration More  than  two  devices  share  the  Link  that  is  the  capacity  of  the  channel  is  SHARED now. With shared capacity, there can be two possibilities in a Multipoint Line Config: Spatial Sharing: If several devices can share the link simultaneously, its called Spatially shared line configuration     Temporal  (Time)  Sharing:  If  users  must  take  turns  using  the  link  , then its called Temporally shared or Time Shared Line Configuration