Internet

Internet

1. Networks

   • computers linked together
   • Communication
   • LAN
     • Local area network e.g school
     • Easier to manage
   • WAN
     • Wide area network e.g internet
   • Network management
   • Sharing resources
   • Client-server
     • Files are stored centrally, easier to manage
     • If the server goes down so does everything
   • Peer to Peer
     • If one goes down everything else will stay up
     • connected together but the the computers are also the server
     • Cheaper

2. Connections

   • Wired,
     • Copper
     • Fibre Optic
     • They go underground
   • Wireless
     • NIC
       • Network interface card
     • 4G

3. Devices

   • Switch
   • Router
     • A router is a networking device that forwards data packets between computer networks
   • Ethernet Cable
   • NIC
     • Network Interface Card attaches to a modem in a mobile phone
   • WAP
     • Wireless Application Protocol is a web browser for mobile devices such as mobile phones that uses the protocol.
   • Cellular Device
   • 4G 3G tower

4. Protocols

   • HTTP
     • Hypertext transfer protocol how hypertexted the language of the www  is moved around the internet
   • HTTPS
     • A more encrypted version of HTTP
   • POP3
     • Post office protocols v3 used for accessing emails
   • SMTP
     • Simple mail transfer protocol used to send emails
   • IMAP
     • Internet message access protocol allows multiple devices to connect to the same email accounh
   • FTP
     • File transfer protocol how files are moved around
   • TCP/IP
     • Transfer control protocol and internet protocol breaks data up into packets
     • TCP/IP stack
   • Ethernet
     • Governs how data is formatted for transmission across a LAN
   • Wi-Fi
     • Controls how data is transmitted wirelessly across a LAN

5. Topologies

   • star
   • Ring
   • Bus
   • Mesh

6. Network security

   • Cyber attacks
     •  Social Engineering Phishing(for idiots), Shoulder surfing Phishing from a "bank to provide details Shoulder surfing isspying on people for their details
   • Unpatched software
   • USB devices
     • Go onto a computer and copy files from someone elses computer and steal information from it and make copys
   • Eavesdropping
     • as information is sent along someone intercepts and steals it
   • The Cloud
     • Using a server to hack into another server containing information or hacking into the server directly

7. Ethical hacking

   • Breaking into something for someone to tell them what's wrong with it

Imagens e arquivos do mapa