The Internet

The Internet

1. Networks

   • What is a network?
     • Computers interconnected
   • Lan
     • Local area network. Usually within a single building. Easier to manage security
   • WAN
     • Wide Area Network. Could be government network or THE INTERNET (Jen)
   • The rest of the junk tucked away in here
     • Client server What is in the school with all the stuff in it. Each node is a client. All connected to that machine over there. If the server explodes then all data is lost Peer to peer All machines connected to each other. All the nodes together make up the server. My files might be on your machine and your files might be on mine but we can both get our files.

2. Connection types

   • Wifi
   • Wires (copper)
   • Wires (fibre optic)

3. Network Devices

   • Device
   • Switch
   • Router
   • Ethernet cable
   • NIC
   • WAP
   • Cellular device
     • A wireless device using a system of low-powered radio transmitters

4. Protocols

   • HTTP
     • Set of rules for web pages
   • HTTPS
     • Same as HTTP but is encrypted at both ends
   • POP3
     • Post Office protocol version 3 for looking at emails.
   • SMPT
     • Sending emails about
   • IMAP
     • Lots of devices to access the same email account
   • FTP
     • File transfer
   • TCP/IP
     • The process that photos are chopped up and re-constructed
   • WI-FI
     • How data is transferred wirelessly
   • Ethernet
     • Data transferred through wires

5. Topologies

   • Star
   • Ring
   • Bus
   • Mesh

6. Security

   • Cyber attacks
     • Social engineering
       • Phishing and other tings related Shoulder surfing
   • Unpatched software
     • Someone has figured out a way to steal data from outdated programs
   • USB drives
     • Stealing data directly from a computer and sell it
   • Eavesdropping
     • Intercepting messages being passed around the internet
   • The Cloud
     • Steal data from the cloud

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