IT

IT

1. NETWORKS

   • Devices of a LAN
     • Hub
       • A device that connects nodes together
       • Not intelligent - data is sent to all nodes across the LAN
     • Switch
       • A device that connects nodes together
       • An intelligent device that can send data to the nodes that the data is intended for
     • LAN
       • A LAN is made out of at least two or more computers (nodes) each of them having a NIC-network interface card can have wires or no wires
         • NICs
           • The NICs convert data signals that are in nodes intodata signals that can be transfered across the network
   • Devices of a WAN
     • WAN
       • A WAN is made up of other LANs it can cover up to hundreds of miles connecting citys to citys
   • Topologies
     • star Topology
       • star topology is were the network is in a star shape all the networks are connected to one server
     • Ring Topology
     • BUS topology