Networks

Networks

1. types of network

   • WAN
     • Wide area network
       • accessed by more than one location
         • global
   • LAN
     • Local area network
       • accessed by users within one building/small group of buildings
         • local

2. Advantages

   • sharing files
     • files are accessible
   • data
     • easily backed up and saved on the server
   • sharing devices
     • easy and cost effected

3. Disadvantages

   • cost
     • servers are expensive
   • increased risk
     • viruses
     • hacking
   • difficulty
     • need expertise to set up

4. topology

   • bus
     • advantages
       • cheap
       • efficient with small network
     • disadvantages
       • high chance of collision
       • problems difficult to spot
   • ring
     • advanagest
       • equal access to resources
       • easy to install and manage
     • disadvantages
       • whole network affected by single node or workstation problem
       • dependence on one cable
   • star
     • advantages
       • Low chance of collision
       • Low chance of collision
       • Low chance of catastrophic failure
       • Easy to put in
     • disaddvantages
       • expensive plus it requires more resources and maintanance
       • More cable required
       • If hub goes down, everything goes down

5. IP address

   • IP stands for internet protocol
     • each computer on a network has its own unique IP address by which it can be identified
       • an IP address V4 is usually in this format 64.233.160.0 – 64.233.191.255
         • A V6 address is a 128-bit IP address compared to V4 which is only 32-bit. V6 allows for more Internet addresses
   • problems
     • duplicate IP address on two devices
     • IP address could not be found message