Unit 1.5 Network Topologies

Unit 1.5 Network Topologies

1. Network Types

   • Mesh Network
     • Some or all workstations are connected to each other
     • Most are usually connected to the node they exchange the most data with
   • Star Network
     • Each device is connected by an individual cable directly to the server
     • These tend to be more reliable and so are used in schools and offices
   • Bus
     • Cheap to install, but if backbone is broken the whole network goes down.
   • Ring
     • Cheap to install. Data travels in one direction reducing the chance of data collisions. A server is not needed.

2. Encryption

   • A method of scrambling data with a key code which makes no sense
   • In order to read it you must have the key
   • We use it with wifi so if data is intercepted it has no meaning

3. Wifi

   • Wireless Frequency
   • Radio Waves transmit data packets without wires
   • It has a cheap set up
   • It can lose signal through obstructions
   • Can connect multiple devices easily but more slowly
   • Can be hacked more easily
   • The user isn't tied to a specific location

4. Ethernet

   • Stable Connection
   • Less likely to be hacked
   • Faster traffic speed
   • Generally gives out a good quality signal