What is the difference between HTTP and HTTPS?
A fundamental networking question asking for the distinction between unsecured and secured web protocols, including encryption and port usage.
Why Interviewers Ask This
Understanding web security basics is non-negotiable for developers. This question checks if you know why HTTPS is critical for data protection and how it differs technically from HTTP in terms of encryption and ports.
How to Answer This Question
State that HTTP is unsecured and transmits data in plaintext, while HTTPS uses SSL/TLS for encryption. Explain that HTTPS protects against interception and ensures data integrity. Mention the default ports: 80 for HTTP and 443 for HTTPS. Note that browsers display a padlock icon for HTTPS sites.
Key Points to Cover
- Encryption via SSL/TLS
- Plaintext vs. Encrypted transmission
- Default port differences (80 vs 443)
- Browser security indicators
Sample Answer
HTTP is an unsecured protocol that transmits data in plaintext, making it vulnerable to interception and tampering. HTTPS, or HTTP Secure, encrypts data using SSL/TLS protocols, ensuring confidentiality and integrity dur…
Common Mistakes to Avoid
- Claiming HTTPS makes the site faster
- Confusing SSL with TLS
- Omitting the port numbers
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