Archives: Theory

Hypertext Transfer Protocol (HTTP)

HTTP is a protocol (set of rules) used when transmitting files (data) over the world wide web. When you browse the WWW using a web browser, you are using the HTTP protocol. Often, you will…

IP and MAC addresses

People often get confused trying to understand the difference between IP and MAC addresses. An IP address is the location of your device on the internet, whilst a MAC address identifies the actual device. What…

Cookies

Cookies are text files.  They are stored on a user’s computer by a web browser, at the request of the web server. A cookie is limited to a small amount of data and can only…

MP3 Audio Compression

MP3s are audio files compressed using lossy compression. The lossy compression allows great savings in file size, with the average MP3 file being 90% smaller than an equivalent uncompressed audio file. Like all lossy compressed…

MIDI

MIDI stands for Musical Instrument Digital Interface. It is an agreed protocol from the early 80s that allows computers, digital musical instruments and other hardware to communicate musical instructions, regardless of manufacturer. Unlike other audio…

Uses of Hexadecimal

What are hexadecimals used for? There are several uses of hexadecimals in computing, as outlined below: HTML / CSS Colour Codes Hexadecimal numbers are often used to represent colours within HTML or CSS. The 6…

Universal Serial Bus (USB)

Universal Serial Bus (USB) is a type of cable and connector commonly used for half-duplex or full-duplex serial data transmission between a computer and attached devices. A USB cable consists of a shielded casing containing…

Verification

Verification is a way of preventing errors when data is copied from one medium to another. Verification does not check if data makes sense or is within acceptable boundaries, it only checks that the data…

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