Node.js API Masterclass with Express and MongoDB - XSS Protection & Security Headers

The video tutorial covers the implementation of security headers using the Helmet package and input sanitization using the XSS Clean package in an Express application. It explains how to install and initialize these packages to enhance API security by adding headers and preventing cross-site scripting attacks. The tutorial also demonstrates the use of Postman to verify the added security measures and discusses the importance of these practices in protecting web applications.

What is the primary purpose of the Helmet package in web applications?

• To add security headers to applications

• To improve the speed of database queries

• To enhance the visual design of a website

• To manage user authentication

What does the DNS prefetch control header do?

• It encrypts DNS requests for security

• It blocks all DNS requests from the browser

• It allows browsers to prefetch DNS information

• It prevents the browser from caching DNS requests

How can you install the Helmet package in a Node.js application?

• By downloading it from the official website

• By writing custom code for security headers

• By using the command 'npm install helmet'

• By using the command 'npm install security-headers'

What is the role of the XSS Clean package?

• To optimize database queries

• To sanitize input and prevent cross-site scripting attacks

• To enhance the user interface of a web application

• To manage user sessions

What happens when a script tag is entered in a form without XSS protection?

• The script is converted to plain text

• The script is automatically removed

• The script is executed, potentially causing harm

• The script is ignored by the server

Which of the following is a feature of the XSS Clean package?

• It sanitizes input to prevent harmful scripts

• It compresses JavaScript files

• It logs all user activities

• It encrypts user passwords

What is the next step after installing the XSS Clean package?

• Enable it in the application to prevent XSS attacks

• Set it up to handle database connections

• Configure it to manage user sessions

• Use it to compress CSS files