NETWORKS

NETWORKS

1. TYPES OF NETWORK

   • WAN
     • Wide area network
     • worldwide
   • LAN
     • Local area network

2. ADVANTAGES

   • SHARED FILES
     • Same files available on any computer in the network
   • SHARED RESOURCES
     • The same printers and internet connection can be used
   • SHARED LOGINS
     • All the computers on the network have the same login password

3. DISADVANTAGES

   • EXPENSIVE
     • Can cost money to make and maintain
   • MORE ROOM FOR ERROR
     • If something goes wrong it can affect every computer
   • DIFFICULTY
     • A technical expertise is required
   • MALWARE
     • Viruses and other malicious software can spread through the network

4. NETWORK TOPOLOGIES

   • BUS TOPOLOGY
     • Consists of a single cable that runs through the network
       • All devices are connected to this single cable
     • Advantage/disadvantage
       • cheap to install - one cable only
       • if the cable breaks the whole network will go down
   • RING TOPOLOGY
     • computers are connected in a ring formation
     • communication only goes in one direction
       • if one computer receives a message, and it is not the intended recipient, it will pass on the message
     • advantage/disadvantage
       • cheap to install - one cable per computer
       • difficult to add new computers
   • STAR TOPOLOGY
     • all computers connected to a central switch
       • the switch directs the traffic to the appropriate computer
     • advantage/disadvantage
       • fast - no collisions
       • expensive - wires and expensive central switch

5. IP ADDRESS

   • Internet protocol address
   • maximum - 225.225.225.255
   • Internal IP
     • an individual IP for everything connected to the internet in a building
   • External IP
     • the IP address of the building
   • IP addresses are made up of 32 1s and 0s
     • 10110100101110001010010101010101
   • 4,228,250,265 is the ammount of devises possible to be assigned to the internet

6. The internet is a huge network

7. there are too many users and not enough IP adress

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