Computer Science Network Revision

Computer Science Network Revision

1. Network

   • Networks allow the transfer of data between connected devices
   • LAN and WAN
     • LAN stands for local area network. It is confined to one site so it is relativly small
       • Advantages of LAN
         • Digital communication between people is enabled
         • Allows sharing of digital information
         • Allows sharing of peripheral devices
         • Allows system to be updated with the latest software from a central point
         • Disadvantages of LAN
           • Expertise are required to install and maintain large networks
           • Security issues
           • You required at least two nodes
           • Each having a NIC These transfer signals to the netowork
     • WAN is set up on one site, the hardware is owned by the organisation and it covers large area's unlike LAN
   • HUB
     • A device that connects nodes together
     • Makes all the connected nodes act as a single segment
     • Cheap devices like a USB hub
   • SWITCH
     • A device that connects nodes together
     • An intelligent device that can create and connect to different segments of the network
     • Directs Network Traffic
   • Wireless Access Point
     • Wireless no need to do building
     • Add a new node to the system with ease
     • There are performance issues and security issues too

2. Network

   • Wireless Access Point
     • There are performance issues and security issues too
     • Add a new node to the system with ease
     • Wireless no need to do building
   • SWITCH
     • Directs Network Traffic
     • An intelligent device that can create and connect to different segments of the network
     • A device that connects nodes together
   • HUB
     • Cheap devices like a USB hub
     • Makes all the connected nodes act as a single segment
     • A device that connects nodes together
   • LAN and WAN
     • WAN is set up on one site, the hardware is owned by the organisation and it covers large area's unlike LAN
     • LAN stands for local area network. It is confined to one site so it is relativly small
       • Advantages of LAN
         • Disadvantages of LAN
           • Each having a NIC These transfer signals to the netowork
           • You required at least two nodes
           • Security issues
           • Expertise are required to install and maintain large networks
         • Allows system to be updated with the latest software from a central point
         • Allows sharing of peripheral devices
         • Allows sharing of digital information
         • Digital communication between people is enabled
   • Networks allow the transfer of data between connected devices