Network

Network

disadvantages
1. viruses can spread to other computers throughout a computer network
2. purchasing the network cabling and file servers can be expensive
3. there is a danger of hacking, particularly with wide area networks
4. managing a large network is complicated, requires training and a network manager usually needs to be employed
advantages
1. sharing devices such as printers saves money
2. site licences are likely to be cheaper than buying several standalone licences
3. files can easily be shared between users
4. network users can communicate by email and instant messenger
5. data is easy to backup as all the data is stored on the file server
6. security is good - users cannot see other users' files unlike on stand-alone machines
Bus Topology
1. advantages
  1. fast (low chance of collisions)
  2. it is easy to set up, handle, and implement
  3. low chance of catastrophic failure (a broken cable only takes out one computer, the rest of the network is fine)
2. disadvantages
  1. the cable length is limited. this limits the number of network nodes that be connected.
  2. each device on the network sees all the being transmitted, thus posing a security risk.
  3. it is heavily dependent on the central bus. a fault in the bus leads to network failure.
Ring Topology
1. advantages
  1. the traffic is unidirectional and the data transmission is high speed
  2. in comparison to a bus, a ring is better at handling load
  3. the configuration makes it easy to identify faults in network nodes
2. disadvantages
  1. the failure of a single node in the network can cause the entire network to fail
  2. the movement or changes made to network nodes affect the entire netwotk's performance
  3. there is heavy dependency on the wire connecting the network nodes in the ring
IP Address
1. computers on a network also need an address to identify them
2. when a computer is added to a network it is assigned an IP Address
3. the IP Address is unique value assigned to each computer on a network
4. each IP address on a network must be unique
5. the IP Address is a 32-bit binary value. this means its made up 32 1s and 0s

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