• Client Server architecture
• HTTP Verbs
  • Get
  • Post
  • Put
  • Delete
• HTTP request
  • Request URL
    • Query Params
  • Request Headers (meta info)
  • Request Body
• HTTP request Headers (meta information of request)
  • Cookie
  • Content­Type
  • Accept
  • Content­Length
• Session Management
• Cookie Manager
• HTTP response
  • Response Code
  • Response status
  • Response Headers (meta info)
  • Response Body
• HTTP request Headers (meta information of response)
  • Set-Cookie
  • Content­Length
  • Content­Type
    • application/json
    • application/xml
• HTTP request Chaining
• HTTP Authentication
  • Managing Session
• HTTP status codes
  • 2xx (successful)
    • 201 : Created
    • 203 : Non-Authoritative Information
    • 204 : No content
  • 4xx (client error)
    • 400 : 400 Bad Request
    • 401 : Un Authorised
    • 404 : Not Found
  • 5xx (server error)
    • 500 : Internal Server Error
• TCP -Protocol Level Interactions

References:

• https://restfulapi.net/
• https://www.restapitutorial.com/httpstatuscodes.html
• https://github.com/rajendrapenumalli/API_Automation_Notes/blob/master/Http_protocol_basics.pdf