How to work with one server if you only have one server, one ip, but multiple website you want to deploy when you are poor student :(

C#面向对象概念

C#基本语法和API

Authentication is a term that refers to the process of proving that some fact or some document is genuine. In computer science, this term is typically associated with proving a user's identity.

What is computer security? What is the history of computer security? Where does computer security come from? Why do we need computer security?