how to get hal_json format as drupal 8 output

I installed Drupal 8 and this modules on my host:

  1. HAL
  2. HTTP Basic Authentication
  3. RESTful Web Services
  4. REST UI
  5. Serialization

According to drupal tutorials when I enter this URL, drupal would show JSON format of node 1:

www.example.com/node/1?format=hal_json
But It shows the normal (HTML) view of node 1.

What should I do to get JSON or hal+json format as output?

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/2/feed