Networks

Networks

1. disadvantages

   • viruses can be spread easely
   • more room for error
   • it is expensive
   • it's difficult to set up

2. advantages

   • you access your files with ease
   • can print from any computer
   • multiple can be used at once

3. Lan

   • A network containe in a single geographical location or organisation
   • local area network

4. wan

   • a network that spans a large area or multiple organisation
   • wide area network

5. topology

   • bus topology
     • it runs through a single cable that run throug a network
     • advantages
       • cheap to install
     • disadvantages
       • large chance of failure
       • lots of colisions
       • as more computers are added it slowa down
   • ring topology
     • Computers are connected to each other in a ring Communication only goes in one direction
     • advantages
       • Cheap to install
       • No collisions (fast)
     • disadvantages
       • High chance of catastrophic failure
       • Difficult to expand
   • star topology
     • All computers are connected to a central switch.
     • advantages
       • Low chance of failure
       • No collisions (fast)
     • disadvantages
       • expencive
       • depends on the switch
   • Mesh topology
     • mesh topology there is no central connection point., but instead each node is connected to at least one other node
     • advantages
       • messages can be received more quickly if the route to the intended recipient is short
       • messages can be received more quickly if the route to the intended recipient is short
     • disadvantages
       • having many connections means that a lot of maintenance is required
       • most of the network may be obsolete if there are better routes to connect nodes, which makes some connections not needed
     • A node is a point in a network where connections intersect

6. IP address

   • an ip address is a unique value assigned to every computer on a network used to idnitify it
   • a message on a network have an ip address attached which is how a computer knows weather or not to keek the message
   • an ip address can range from 0.0.0.0 to 255.255.255.255 which means that there are 4,228,250,625 avalible ip addresses
   • IPv6
     • ipv6 stand for internet protocol version 6
     • IPv6 is a thing to tackle the amount of ip adresses left to use, the ipv6 has more digits do