TOPICS
      • Networking basics
      • Need for computer networks
      • Types of networks-LAN, MAN, WAN
      • Network Components – H/W, Software
      • Communication channels
      • Network Devices
      • Network topologies.
        NETWORKING 
        INTRODUCTION
        • A network is a collection of independent computers which are connected together to share 
         information and resources.
        • In addition to computers, a network also consists of peripheral devices and data communication 
         devices with transmission media used for the purpose of exchanging data and information.
        • Need for computer networking
          – To share computer Data/Programs
          – To share computer Resources
        • Bandwidth
        • Bandwidth refers to the maximum volume of information that can be transferred over any 
         communication medium.
        TYPES OF NETWORKS
             • Based on the geographical area covered by the network, 
              networks can be classified as follows: 
             Local Area Network (LAN): 
               – A  data  communication  network  that  connects  computers 
                together in a room, building or a campus is called a ‘Local area 
                network’. 
             A Metropolitan Area Network (MAN):
               – A MAN typically covers an area of between 5 to 50 kms.
             A wide area network (WAN):
               – It is a system of interconnecting many computers over a 
                large geographical area such as cities, states, countries 
                or even the whole world. 
   NETWORK COMPONENTS
   •Hardware
   •Software
   •Communication Channels
   •Network Devices
     COMMUNICATION 
     CHANNELS
     • Communication Channels refers to the physical media through 
      which communication signals are transmitted.
     • The two commonly used types of cables (Wired TM) to connect 
      computers are coaxial cables and fiber optic cables.