Question

Which of the following protocol is used by browsers to fetch web page?

• A. HTTP
• B. FTP
• C. IMAP
• D. SMTP

Answer 1

Answer:

A. HTTP

Hypertext Transfer Protocol (HTTP)

• HTTP is the foundation of data communication for the World Wide Web.

• It is an application layer protocol that defines how messages are formatted and transmitted, and what actions web servers and browsers should take in response to various commands.

• Browsers use HTTP to request resources (like HTML documents, images, CSS stylesheets, and JavaScript files) from web servers.

• The server then responds with the requested resource or an error message.

• HTTP is a stateless protocol, meaning each request from a client to a server is treated independently.

• The original version was HTTP/1.0, followed by HTTP/1.1, and currently, HTTP/2 and HTTP/3 are the latest versions, offering improvements in speed and efficiency.

• HTTPS (Hypertext Transfer Protocol Secure) is a secure version of HTTP that uses encryption (SSL/TLS) to protect the data exchanged between the browser and the server. This is crucial for sensitive transactions like online banking or e-commerce.

• Other related protocols include:

  • FTP (File Transfer Protocol): Used for transferring files between a client and a server.

  • SMTP (Simple Mail Transfer Protocol): Used for sending emails.

  • POP3 (Post Office Protocol version 3) and IMAP (Internet Message Access Protocol): Used for retrieving emails.