Topic 19- Networks

Networks
1. What is a network
  1. A network is when two or more computers are linked together so they can share resources
    1. Client- Server Networks-A powerful computer called the server, is used to store data for the network, which the network is dependent on,
    2. Peer to peer network- All computer share resources, as more people use, it slows down
LANS AND WANS
1. LANS
  1. LANS ( Local Area Network) - Confined to a small area, located to a single building, Cheap to build and run
2. WANS
  1. WAN-( Wide Area Network)- Cover a wide area, used in different buildings , expensive to build and run
Topologies
1. Ring Toplogies
  1. Advantages- Easy to add extra devices, each computer has same access
  2. Disadvantages- If there is a break, whole network fails, faults are difficult to locate, impossible to keep network runing while adding new hardware
2. Bus Toplogies
  1. Advantages- All devices are connnected using one cable, signals are passed along the backbone in each direction. Cost effective, and easy to add extra devices
3. Star Toplogies
  1. Advantages- Fault and load tolerant and easy to add extras
  2. Disadvantages- Higher Cost, and dependance on router/ switch.

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