How to access protected trade databases

List of contents of this article:

• 1,Briefly describe the structure of web technology
• 2, What does web technology include
• 3, The composition of the web system and the functions of each part?
• 4 、 What technologies does the Web front-end mainly include?Xiaobai asks for an answer

Briefly describe the structure of web technology

Traditional Web database system architecture Traditional Web database system generally realizes the connection and The application can take two methods, one is to provide middleware on the web server side to connect the web server and the database server, and the other is to download the application to the client and directly access the database on the client.

The core of the web system is the web server. The web server software is installed on a hardware server device to form a web server. The web server adopts ADO, ODBC and other technologies to connect with external resources (database)It uses HTML, XML, Java, JavaScript and other development tools to make an information resource system.

Applications of some frameworks: applications of vue.js, angular.js, node.js and other frameworks. Understand the basic configuration of the Web server for Apache, master the htaccess configuration skills, and the web front-end development technology, and also need to learn some seo optimization techniques, because the front-end often comes into contact with the website.

Performance (Presentation). Performance technology is used to control the display of structured information, including layout, color, size and other forms of control. WEB standard technologies for performance include: CSS (Cascading Style Sheets) cascading style sheets.Behavior (Behavior).

web includes two parts: web server and web client. Java has Java Applet in client-side applications, but it is rarely used. Java has rich applications on the server side, such as Servlet, JSP, third-party frameworks, etc. Java technology has injected a strong impetus into the development of the Web field.

In fact, the WEB standard is not a certain standard, but a collection of a series of standards. The web page mainly consists of three parts: Structure, Presentation and Behavior.

web technology includes what

1. Web technology includes JavaScript, database, security technology, etc. JavaScript. JavaScript was originally created to "make the web page more vivid". The program written by this programming language is called script. They can be written directly in the HTML of the web page and executed automatically when the page is loaded.

2. Web development technologyWhat does it include: JavaScript, java, HTML, PHP, web server. The introduction of Java Web is as follows: Java Web is a technology stack that uses Java technology to solve related web Internet fields. The web includes two parts: the web server and the web client.

3. Web programming technology. Web database application development technology.

4. The three major technologies of Web front-end are HTML, CSS and JavaScript. HTML is one of the most basic technologies in Web development, which defines the content and structure of the entire page. HTML consists of many tags, each of which has a specific purpose. By combining various tags, a complete web page can be created.

The composition of the web system and the functions of each part?

1. Web system management is the management of application systems (including network services), which is specifically divided into static and dynamic operation management, system configuration management, performance adjustment management, information resource management, system personnel management, etc., which ensures the efficient, reliable, convenient and fast use of the Web platform.

2. In actual application, the architecture of the WEB system generally has several parts: load balancing, authorization verification (optional), static content service, dynamic content service (business logic), database, operation and maintenance background.

3. Components of the Web system: page: hypertext documents are displayed on the user endShow as Page Browser: The page is viewed through a program called Browser. Hyperlink: The text string linked to other pages in the page is called hyperlink, which is generally highlighted.

What technologies does the Web front-end mainly include? Xiaobai asks for an answer

Web front-end technology mainly includes: html, css, js and other basic technologies for WEB front-end development. JQuery, html5+csshttp+ajax+json+nodejs+mysql+mongoDB and other advanced technologies such as front-end and back-end interaction, vue, react, applet, app hybrid development, etc.

Web front-end technology mainly includes HTMLCSSLess, Sass, responsive layout, mobile development, and Ps design, etc. More advanced front-end developers also need to master JavaScript language, Mysql, Mongodb database development, v Ue.js, webpack, elementui and other front-end framework technologies.

Web front-end development includes technologies: Learning CSS well is an important point of web page appearance. CSS can help make the web page appearance more beautiful. Div layout: DIV elements are elements used to provide structure and background for large chunks of content in HTML documents. Learn the basic syntax of JavaScript and how to use it.