Protocols

Protocols

1. TCP/IP

   • TCP/IP dictates how data is sent between networks
   • Transmission Control Protocol
     • This sets the rules for how devices connect on the network
     • It is in charge of splitting data into packets and reassembling them when it is received
     • It is also responsible for checking the data is sent and delivered correctly
   • Internet Protocol
     • This is responsible for packet switching which is used to direct the data

2. HTTP & HTTPS

   • Hyper Text Transfer Protocol
     • This is used by web browsers to access websites and communicate with web servers
   • HTTP Secure
     • This is a more secure version of HTTP as it encrypts all information sent and received

3. FTP

   • File Transfer Protocol
   • This is used to access, edit and move files between devices on a network
   • For example, to access files on a server from a client computer

4. Email Protocols

   • POP
     • Post Office Protocol
     • Used to retrieve emails from a server
     • The server holds the emails until you download it, at which point it is deleted from the server
   • IMAP
     • Internet Message Access Protocol
     • Used to retrieve emails from a server
     • The server holds the email until you delete it - you only download a copy
     • Used by most web-based email clients
   • SMTP
     • Simple Mail Transfer Protocol
     • Used to send emails and to transfer emails between servers