Glossary

A

alt texta form of metadata that provides a description of an image, alternative text is for screen readers and for displaying if the image can’t be loaded for some reason.  It is also read by search engine robots and contributes to their reading of a page, so can impact SEO

B

blacklistingblocking entities from communicating with (or logging into) a computer, site or network.  Blocked entities can include IP addresses, user IDs, domains, email addresses, MAC addresses and programs.  Blacklisting is a common in antivirus programs, firewalls and spam filters

C

CSS(Cascading Style Sheet) used to define styles (e.g. for web pages) including the design, layout and variations in display for different browsers, devices and screen sizes.  W3Schools.com CSS Reference

D

DNS(Domain Name System) turns domain names into IP addresses (which browsers use to load internet pages).  Every device connected to the internet has its own IP address, which is used by other devices to locate the device.  DNS servers allow people to use names for their domains rather than having to remember a string of random numbers

domain namethe part of i) a web address between ‘//’ and the first ‘/’ or ii) an email address after the ‘@’.  A unique string of text (that maps to an IP address using DNS) used to connect to the website or email server of an organization or person on the Internet

E

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H

HTMLthe standard ‘markup language’ for web pages.  W3Schools.com HTML element reference

I

ICT(Information and Communication Technology)

IP addressa unique string of characters that identifies each computer (using the “Internet Protocol”) on a network.  WhatIsMyIPAddress.com

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Q

R

resolutiona measurement of width and height in pixels.  e.g. a photo, video or monitor with a 1920×1080 resolution would be 1920 pixels wide and 1080 pixels high

S

SEO(Search Engine Optimisation) the process of controlling what search terms you rank for and elevating where in the results you appear

SIMS(Schools Information Management Systems) an application used by schools to manage pupil, staff and resource information

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