Protocols

Protocols

1. Application

   • FTP
     • Used to transfer files between a client and server on a network
   • IMAP
     • Allows emails to be downloded on your device and keeps it on the server
   • POP
     • Allows emails to be downloaded from an email server to your device then deletes it from the server
   • SMTP
     • Used to send and recieve emails from other mail servers
   • HTTPS(S)
     • The HTTP protocol allows the web browser to request the indvidual file e.g images or text and is then put in to a web page. HTTPS is the same as HTTP but secure so the browser or server enrypts the data before it is sent to the other and only they can decrypt it.

2. Tranport

   • TCP

3. Network

   • IP

4. Link

   • BLUETOOTH
     • Bluetooth allows devices nerby to interact and it works up to 10 metres e.g pairing your smartphone to your smart watch
   • ETHERNET
     • Most common protocol for a LAN. Hardware - Specifies the performance expected of network cables, plugs and sockets. Data Format - Describes the format of the data packet being sent or received. How to deal with data collisions.