HTTP/1.0
In HTTP 1.0 (short-lived connections), a new TCP connection was established for each request and response, and a three-way handshake was performed before each connection was opened. This meant that the connection was closed after each request was served, and a new connection had to be established for each subsequent request. This also explains why HTTP 1.0 did not support persistent connections.
sequenceDiagram
participant Client
participant Server
Note over Client,Server: Establish Connection
Client->>Server: GET index.html
Server->>Client: 200 OK
Note over Client,Server: Close Connection
Note over Client,Server: Establish Connection
Client->>Server: GET main.css
Server->>Client: 200 OK
Note over Client,Server: Close Connection
Note over Client,Server: Establish Connection
Client->>Server: GET main.js
Server->>Client: 200 OK
Note over Client,Server: Close Connection
HTTP/1.0 was designed primarily for static content, such as HTML pages and images, and it uses a request/response model for communication between the client and server.