I'm glad you summarized the key parts of the vague HTTP learning!! I'll have to review the relevant parts again with the Perfect Guide book to solidify it more.

leedh00082563

Learn the core HTTP features essential for practical use and how to design proper HTTP APIs.

HTTP Web Basics for Every Developer

입문

초급

중급이상

Network

Introduction

Internet network

URI and Web Browser Request Flow

HTTP Basics

HTTP Methods

Using HTTP Methods

HTTP Status Code

HTTP Header 1 - General Header

HTTP Headers 2 - Cache and Conditional Requests