INFO 2 Topic 4 Summary

INFO 2 Topic 4 Summary

1. Elements of and ICT Network

   • Communication Devices
     • Router
     • Switch
     • Hub
     • Network interface cards
   • Networking Software
     • Network operating systems
     • Network management software
   • Data transfer media
     • metal wires
     • Wifi
     • Fiber optic cable
   • Standards and Procedures
     • enable devices to communicate with each other
     • Ensure the security of the system

2. Network Topologies

   • Ring
     • only one path for data
     • Faults hard to locate
     • Equal status of devices
     • Easy to add devices
     • circular configuration
   • Bus
     • only suited for small networks
     • Has a backbone cable
     • Easy to add extra devices
     • Small amount of cable
   • Star Topology
     • Central connection hub
     • Fault Tolerant
     • easy to add extra computers
     • higher cost because there is needed more cable
     • Dependent on central hub, switch, router or computer
   • Mesh
     • Fault tolerant
     • easy to locate faults
     • higher costs
     • harder to maintain

3. Networks

   • Intranets
     • private network
     • uses the same technology as the internet
     • only used by employees
   • Extranets
     • not restricted to just emplyees
     • suppliers, customers and other trading partners can access it
     • Can use public or private comuuinications
     • uses the same technology as the internet

4. Relative advantages and disadvantages of networks

   • Disadvantages
     • technical knowledge needed
     • Lack of access when file server fails
     • Cost
   • Advantages
     • central maintenance and support
     • Improved communications
     • Easier to implant acceptable use policies
     • Easier to backup files
     • Improved security
     • Lower software costs
     • Ability to share costs
     • Ability to share hardware resources
     • Ability to share software
     • ability to share files

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