Home-learning

Home-learning

1. Network Hardware

   • Switch
     • Switches are more efficient than hubs and only send the data packets to the computer that requested them
   • Hub
     • Hubs are a devise that when a desktop wants a page, it sends it to all the PC's and only the one with the correct IP adress recives it.
     • Good for a small network but cannot handle a big one.
   • Router
     • A router connects the devises to the internet and is a 'traffic warden' for the internet traffic. Directing it where it needs to go.
   • Server
     • File Server
       • All files are stored in a user area on a server instead of an indervidual PC and can be accessed by any PC on the Network.
     • Email Server
       • All emails pass through here and they than get put into the respective inbox of the reciver
     • Print Server
       • Instead of a direct link to a printer, the file gets sent to a print server, which can be printed from any printer like the follow me system
     • Back Up
       • Back up is stored on tape and is commonly used in financial buisnes.
   • Station
     • Any devise that connects to all the servers
       • Tablets
       • Phone
       • Desktops
       • Laptops

2. Network Types

   • LAN
     • LAN stands for Local Area Network
     • It is only subject to something such as a house or school's network
   • WAN
     • Wider Area Network
     • Subject to a wider area such as a neighbourhood.

3. Topology

   • Ring
     • Network is in a ring shape and this avoids data collisons
   • Star
     • Goes from a centeral point and branches out to all of the workstations
   • Bus
     • Goes up a street into the Pc and goes back down.
   • Mesh

4. I[ Address also known as Internet Protocols tell the DNS serever where to send the packages of data

5. DNS

   • Domain Name Server
   • This holds the names and adresses for the various websites

6. CMD

   • Tracert (Web)
     • If you put this into command prompt it will show which servers around the world it hits
     • Called Hops
   • Ping(web)
     • Send data to see if a reply is heard.