The term information technology or IT is refered to an entire industry. In actuality, information technology is the use of computers and software to manage information. In some companies, this is referred to as Management Information Services (or MIS) or simply as Information Services (or IS).
Computer Networking is a focus within engineering that deals with communication between computer systems or devices. Computer networking is often considered a sub-discipline of a few areas: telecommunications, computer science, information technology and/or computer engineering. Computer networks rely heavily on the theoretical and practical application of each of these engineering disciplines.
A computer network is any set of computers or devices connected to each other with the ability to exchange data.
Network analysis - it's an analysis of vulnerable of components of the networks (such as database servers, firewalls, routers, application servers, mail, WEB, workstations) to address these vulnerabilities, network optimization and reliability.
HTML, which stands for HyperText Markup Language, is the predominant markup language for web pages. It provides a means to create structured documents by denoting structural semantics for text such as headings, paragraphs, lists etc as well as for links, quotes, and other items. It allows images and objects to be embedded and can be used to create interactive forms. It can include or can load scripts in languages such as JavaScript which affect the behavior of HTML processors like Web browsers; and Cascading Style Sheets (CSS) to define the appearance and layout of text and other material.
Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation semantics of a document written in a HTML. CSS is designed primarily to enable the separation of document content from document presentation, including elements such as the layout, colors, and fonts. This separation improves content accessibility, provide more flexibility and control in the specification of presentation characteristics.
JavaScript is an object-oriented scripting language used to enable programmatic access to objects within the client application. It is primarily used in the form of client-side JavaScript, implemented as an integrated component of the web browser, allowing the development of enhanced user interfaces and dynamic websites.
Dynamic HTML, or DHTML, is a collection of technologies used together to create interactive and animated web sites by using a combination of a HTML, JavaScript, CSS.
DHTML allows scripting languages to change variables in a web page's definition language, which in turn affects the look and function of otherwise "static" HTML page content, after the page has been fully loaded and during the viewing process. Thus the dynamic characteristic of DHTML is the way it functions while a page is viewed.
By contrast, a dynamic web page is a broader concept - any web page generated differently for each user, load occurrence, or specific variable values.
PHP is a widely used, general-purpose scripting language that was originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document.
Originally designed to create dynamic web pages, PHP now focuses mainly on server-side scripting.
PHP currently work with many databases, such as MySQL, MS SQL, Oracle, Informix, PostgreSQL and many others.
PHP is normally used an Apache module and this makes it very fast. It is entirely written in C and is quite small, so loads and executes quickly with small memory footprint.