What is difference between HTTP and HTTPS header?

  1. What are benefits of using HTTPS over HTTP?
  2. What settings needs to be done for making website HTTPS?
  3. Can we use HTTPS for only login purpose and then onwords HTTP?
  4. Is there any threat present in HTTPS?
  5. Is processing time required for HTTPS is greater than HTTP?
  6. Does HTTPS cost more than HTTP?
Edit
Report