Chapter 3: Web Applications · Term 1
Lesson 3-2 explained: Web Application Communication Methods
Client requests, server responds — over HTTP/HTTPS, with a method (GET/POST), a status code, and often an API returning JSON.
Lesson summary
A web application works when a client — a browser or app — sends a request and a server processes it and returns a response.
Takeaway: Client requests, server responds — over HTTP/HTTPS, with a method (GET/POST), a status code, and often an API returning JSON.
Key terms
- Client
- Server
- HTTP
- HTTPS
- HTTP method
- Status code
- API
- JSON
Textbook page: Arabic book 56 · English book 62
Free questions on this lesson
From the textbook question bank. Think of the answer first, then open it.
1. What is the client in web application communication?
- A number that reports the result of processing a request
- A data format that is easy for people to read
- The side that requests data or processing from the server
- The side that receives requests, processes them and replies
Answer
Correct answer: The side that requests data or processing from the server
The client is the side that requests data or processing from the server.
1. Client and Server · page 63
2. What is an HTTP method?
- A number in the response that reports the processing result
- The site address beginning with https://
- A program that turns data into JSON
- Information in a request saying what operation is wanted
Answer
Correct answer: Information in a request saying what operation is wanted
A client's request includes an HTTP method that indicates what kind of operation is desired.
3. HTTP Requests and Responses · page 64
3. What is JSON?
- A request method used to submit form contents
- A data format easy for people to read and computers to process
- A protocol that encrypts data travelling between client and server
- A status code meaning the server did not find the page
Answer
Correct answer: A data format easy for people to read and computers to process
JSON is a data format that is both easy for humans to read and for computers to process.
4. API (Application Programming Interface) · page 64
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Lessons in this chapter 3: Web Applications
- 3-1 The Overall Structure of Web Applications
- 3-2 Web Application Communication Methods
- 3-3 Fundamentals of Frontend Technology