Protocols

Protocols

1. Application Level 4

   • IMAP
     • Internet Message Access Protocol (IMAP) is similar in many ways to POP but it also offers more complex commands to manage emails on the server itself.
   • POP
     • Post Office Protocol (POP) allows emails to be downloaded and /or deleted from a mail server and viewed offline by an email client.
   • HTTP (S)
     • Hyper Transfer Protocol
       • web pages are sent and recieved via the http(S) protocol
   • SMTP
     • Simple Mail Transport Protocol (SMTP) is used by the mail server itself to send and receive emails from all other mail servers across the internet.
   • FTP
     • File transfer protocol
       • a standard network protocol used to transfer (i.e. upload and download) files between a client and server on a computer network.

2. Transport Level 3

   • TCP
     • The process used for communicating over the internet. It divides the message into packets

3. Network Level 2

   • IP
     • when transmitting messages, this protocol is responsible for providing the destination address and to recognise incoming data packets

4. Link Level 1

   • BLUETOOTH
     • This is a wireless protocol that was developed to allow devices that are very close to one another to exchange data. It works up to 10 metres, but most often the devices are within a metre of each other
   • ETHERNET
     • Ethernet is a family of protocols responsible for sending and receiving data along a network cable. Ethernet works over a range of data speeds hence the reason for a family of protocols rather than just one.