Common Protocols | 3.2 | OCR GCSE Computer Science | J277

11 flashcards

Transmission Control Protocol / Internet Protocol TCP / IP

Reliably exchanges data between devices on the internet.

How does TCP / IP work?

1. TCP breaks down data into packets and ensures that they are ordered correctly. 2. IP handles addressing and routing the data to the correct destination.

HyperText Transfer Protocol / HTTP Secure HTTP / HTTPS

Used by web browsers to access websites and communicate with web servers.

How does HTTP work?

A web browser uses HTTP to request and access a web page from a web server.

Why is HTTP no longer used?

Because HTTPS is more secure version that uses encryption for better protection against data interception.

File Transfer Protocol FTP

Used to transfer files across a network.

When is FTP most often used?

To upload and download files between clients and a server.

Simple Mail Transfer Protocol SMTP

Used to send emails to and between email servers.

Post Office Protocol POP

Used to retrieve and store emails from an email server, onto a computer.

Internet Message Access Protocol IMAP

Used to retrieve and store emails from an email server, onto a computer./

What is the difference between POP and IMAP?

POP deletes the emails from the server once they are downloaded. IMAP syncs and saves emails so they can be accessed across multiple devices.