Be familiar with the client server model.
####Additional Information
Client sends a request message to server, server responds to request by replying with a response message to client.
Be familiar with the Websocket protocol and know why it is used and where it is used.
HTTP Method | CRUD Method | SQL Function |
---|---|---|
GET | Retreive | SELECT |
POST | Create | INSERT |
PUT | Update | UPDATE |
DELETE | Delete | DELETE |
####Additional Information
The Websocket specification defines an API (Application Programming Interface) establishing a full-duplex 'socket' connection between a web browser and a server over TCP. This means that there is a persistent connection between client and server, allowing both parties to send data at any time.