IT3 - Topic 1

IT3 - Topic 1

1. Peer to Peer - A network arrangement where each computer is of equal status.

   • Backups can not be made centerally.
   • Cost of set up is cheaper as no server is needed.
   • Users need more IT knowledge.
   • No Network manager is needed.

2. Client Server - A network several computers are connected to a centeral server.

   • Back ups are made centeral
   • Cost of set up is expensive due to servers.
   • Network managers allocate access to resources.
   • A network manager is needed and given responsibility.

3. Network Topologies - Shows how the computers are connected with wires when used and if wireless.

   • Ring Topology
     • This is a ring network which is also a peer to peer as it has no server.
   • Star Topology
     • Uses a centeral connection point to connect all the devices on the network together.
   • Bus Topology
     • All the devices connected to the network are connected to a common shared cable.

4. Advantages and Disadvantages of wireless networks:

   • Allows inexpensive LANS to be set up without cables.
   • Allows people the freedom of working anywhere.
     • Global standard you can use WI-FI over the world.
       • Power consumption is high if you use WI-FI on a device
         • There may be sercuity problems such as encryption.

5. Factors affecting the choice of a network:

   • Cost of the network:
   • Size of organisation
   • How the system will be used
   • Existing system
   • Performance required