Client-Server Model Quiz

Client-Server Model

• Servers handle incoming requests from clients but do not initiate services themselves.
• A server program runs indefinitely unless interrupted by an issue.

Advantages of Client-Server Networks

• Centralized Data: All data is stored on the server.
• Security: Resources are centrally managed for enhanced security.
• Performance: Dedicated servers improve the speed of shared resources.
• Scalability: Allows for separate scaling of clients and servers.

Disadvantages of Client-Server Networks

• Traffic Congestion: High request volumes can slow down server response.
• Server Downtime: When servers fail, clients cannot access services.
• Hardware Limitations: Regular hardware may not support multiple clients, requiring specialized server hardware.
• Vulnerability to Attacks: Clients can get infected by malware; servers are susceptible to Denial of Service (DoS) attacks.
• Data Transmission Risks: Packets can be spoofed or modified during transit.

Types of Web Developers

• Frontend Developers: Use HTML and CSS to design user interfaces that function across devices.
• Backend Developers: Code the server-side logic and manage user input actions (e.g., processing form submissions).
• Full Stack Developers: Capable of working on both frontend and backend, adapting based on project needs.

Introduction to HTML

• HTML: Stands for Hyper Text Markup Language; foundational language for structuring web pages.
• Uses HTML tags for defining elements, which are enclosed in angle brackets (<>).
• HTML files must have a .html or .htm extension and can be created with any text editor.

Web Page Structure Considerations

• Plan the type of content and information to include on the website.
• Establish clear goals for the site and organize content into main topics and a logical structure.

HTML Tags and Elements

• HTML elements are indicated by tags that typically appear in pairs (start and end tags).
• Tags are not case sensitive; both <TAG> and <tag> are valid.
• The text between the start and end tags constitutes the element's content.

Creating and Viewing HTML Documents

• Write HTML in a text editor (e.g., Visual Studio, Notepad).
• Save the document with a .html extension to create a document source.
• View the HTML page using a web browser by navigating to the saved file.

HTML Image Handling

• Image Tag: Defined with <img> and requires the src attribute for the image's URL.
• Images can be placed within content and will render where the tag appears in the document.
• Images can be adjusted for size and alignments according to layout needs.

HTML Tables

• Tables are created using the <table> tag, with rows defined by <tr> and data cells by <td>.
• The border attribute displays table borders, which are not shown by default.

HTML Frames and Framesets

• Frames allow the division of the web page into multiple sections using <frameset>.
• Columns can be defined with specific sizes (in pixels or percentages) to manage spacing.

HTML Forms

• Forms collect user input and are indicated by the <form> tag.
• Common input types include text fields, radio buttons, and checkboxes, each defined by their respective tags (e.g., <input>).

Handling Form Submissions

• The action attribute of a form determines where the form data is sent upon submission.
• Forms can include diverse input fields and interactive elements like buttons for submission.

Best Practices for Forms

• Use clear labels and structures to guide user interaction.
• Allow for multiple selections with checkboxes and single selections with radio buttons.
• Ensure forms have a designated backend to process the data collected efficiently.