Protocols

Protocols

1. Application Layer

   • SMTP
     • Simple mail transport protocol. Used by the mail server to send/ retrieve other mail serveers accross the internet.
   • FTP
     • File Transfer protocol. used to upload/ download data between a client and a server.
   • IMAP
     • Internet message access protocol. Is the same as Pop but the email remains on the server even afterbeing downloaded onto the device.
   • POP
     • Post Office protocol. allows emails to be downloaded and or deleted from a mail server and viewed offline by an email client.
   • HTTP(s)
     • Hypertext Transfer Protocol (secure). Is the protocol underlying the world wide web

2. Transport Layer

   • TCP
     • Transmision control Protocol. prepares messages for transport and reassembles any received messages. (sends them in packets)

3. Network

   • IP
     • Internet Protocol gives the name of the packets and device a numbered sequence to show the address.

4. Data Link Layer

   • BLUETOOTH
     • Used to send data between devices that are very close to each other. For example smart watch pairing wiht your phone.
   • ETHERNET
     • a family of protocols responsble for sending and retrieving data along a network cable.