Unit 28 D1

TCP/IP TCP means transmission control protocol and is made up of two layers, the first is a section which handles all the data and is sent to other computers. The TCP programme is pre downloaded on to any computer that you can purchase and can be pre installed on the internet. When the main roles of the TCP is compressed into all the data it is being sent to smaller packets and these packets get sent to their destination. In order to know what destination their being sent too the main data packets will be sent to the second protocol and is used to obtain the address that the data is being sent too. This protocol adds the address to the packet, this section is read first before moving the packet as it can determine the destination IP address that the packet will be sent to.




HTTP means Hyper Text Transfer Protocol, HTTP is the underlying language used by the World Wide Web, HTTP defines how messages are formatted and transmitted and what actions Web servers and browsers should take in response to various commands. The web browser (client) uses HTTP to transmit the request for the webpage (HTML document) to the server, if the document exists the server will respond with a 200 status code and transfer the requested document back to your web browser using the HTTP language.

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   HTTPS means Hype Text Transfer Protocol Secure this does the same as HTTP although this is a more secure, safer version. This type of protocol is used when people are exchanging sensitive data e.g- login information and when someone has logged into the website, this means that the data is stored only to the computer that you are using. E.g- When using Facebook or Banking when you type it in on the computer the S sound automatically appear to show you that the website is secure and it stops people hacking into it.

SMTP means simple mail transfer protocol which is the internet standard for electronic mail transmission, this protocol allows people to send electronic mail between two computers e.g- Hotmail. SMTP is a protocol (language) for sending e-mail messages between servers, and store and forward system. Most email systems that send mail over the internet use SMTP to send messages from one server to another, the messages can then be retrieved with an email client.