Gartner Terms
  Captive Portal
  Magic Quadrant
  SASE (Secure Access Service Edge)
  SD-WAN (Software-Defined Wide Area Network)
  SSE (Secure Service Edge)
  SIEM (Security information and event management)
  SDN (Software Defined Networking)

Why Cloud, Data, Control Plane

Ways Web Client connect to Web Server
  1. Pooling
  2. Long Pooling
  3. WebSockets
  4. Web hooks