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Basic Computer Maintenance & Networking

        
        * Data Communications
          Data Representation
* Basic Concepts -
                                       (i)     Servers,
                                       (ii)    Client, 
                                       (iii)   Workstation, Hosts
                                        (i)     Peer-to-peer,
                                        (ii)    Client-Server,
                                        (iii)   Distributed

* Transmission Types : Simplex, Half duplex and Full duplex

â–¶ Network Topology and Networking Devices
        â—‰ Types of Topology -        
(i)     Bus Topology;
(ii)    Ring Topology; 
(iii)   Star Topology;
(iv)   Mesh Topology;
(v)    Tree Topology;
(vi)   Hybrid Topology;
        â—‰ Network Control Devices -
(i)     Hubs;
(ii)    Switches;
(iii)   Routers;
(iv)   Bridges;
(v)    Repeaters;
(vi)   Gateway;
(vii)  Modems;

â–¶ Transmission Media

        * Guided Media - Twisted Pair - UTP, STP ; Coaxial Cable ; Optical Fiber. 
        * Advantages of Optical Fiber and Disadvantage
        * Un - Guided Media : Wireless Communication - Communication Band ; 
        * Microwave Communication ; Satellite Communication