networks

networks

1. disadvantages

   • High chance of catastrophic failure (a break in the central cable takes out the entire network) High chance of collisions (multiple communications on the same cable that corrupt each other, slowing down the network) More computers mean more collisions, so the network gets slower as it gets bigger
   • Expensive – extra hardware and wiring needed
   • More room for error – if something goes wrong it can affect every computer
   • Difficult – it requires a technical expertise
   • Malware – viruses and other malicious software can spread through the network
   • Expensive (needs a lot of cabling, and a central switch, which is expensive) Failure of the switch will take down the network

2. advantages

   • Cheap to install (only one wire needed)
   • Share files, so the same files are available whichever computer you use Share resources such as printers and Internet connection.
   • Share Logins, so the same username and password can be used on every computer on the network.
   • The data is easy to backup if a device gets broke .
   • You can block websites on the network.
   • Cheap to install (one cable per computer) No collisions - only one computer is transmitting on each cable
     • network topolagies
       • disadvantages
         • star
           • Expensive (needs a lot of cabling, and a central switch, which is expensive) Failure of the switch will take down the network
         • ring
           • High chance of catastrophic failure (if any cable breaks or any computer goes down, the entire network fails Difficult to add new computers
         • bus
           • High chance of catastrophic failure (a break in the central cable takes out the entire network) High chance of collisions (multiple communications on the same cable that corrupt each other, slowing down the network) More computers mean more collisions, so the network gets slower as it gets bigger
       • advantages
         • star
           • Fast (low chance of collisions) Easy to add new computers Low chance of catastrophic failure (a broken cable only takes out one computer, the rest of the network is fine)
         • ring
           • Cheap to install (one cable per computer) No collisions - only one computer is transmitting on each cable
         • bus
           • Cheap to install (only one wire needed)
   • Fast (low chance of collisions) Easy to add new computers Low chance of catastrophic failure (a broken cable only takes out one computer, the rest of the network is fine)

3. error box

4. types of networks

   • lan
     • Local Area Network A network in a small area or single organisation
   • wan
     • Wide Area Network A network that spans a large area or multiple organisations

5. ip address

   • internal ip
     • device inside house
   • outside house

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