Topic 8 - Networks

Topic 8 - Networks

1. Extranets

   • Suppliers, customers and other trading partners can access it
   • uses same technology as internet
   • Can use public or private communications
   • Not restricted to just employees
   • Need user-id and password to access

2. Intranets

   • Only used by employees
   • Uses the same technology as internal
   • Private network

3. Relative disadvantages and advantages of networks

   • Advantages
     • ability to share software
     • lower software costs
     • improved security
     • Easier to implement acceptable uses and policies
     • Ability to share files
     • ability to share hardware resources
     • Central maintenance and support
     • Easier to backup files
     • improved communications
   • Disadvantage
     • Technical knowledge needed
     • Lack of access when file servers fail
     • Cost

4. Elements of an ICT network

   • Communication Devices
     • Network interface card
     • Hub
     • Switch
     • Router
   • Networking Software
     • Network operating system
     • Network Management software
   • Standards and procedures
     • Enable devices to communicate with each other
     • Ensures the security of the system
   • Data Transfer Media
     • Metal wires
     • Fibre optic cable
     • Wireless