Web basics – client-server architecture
When I began my career in IT back in 1991, I worked for a company called Electronic Data Systems (EDS). It was a different era. Back then, any serious computing was performed by monolithic systems called mainframes. Imagine a mainframe computer as an incredibly powerful and large-scale computer that existed before the era of personal computers and smartphones. It was like a supercomputer, capable of handling massive amounts of data and performing complex computations.
Mainframe computers were typically housed in specially designed rooms or data centers because they required a lot of space and specialized power and cooling systems to function properly. The typical mainframe was usually about the size of a minivan while its separate Power Distribution Unit (PDU) was roughly twice the size of a typical clothes dryer. The Direct Access Storage Device (DASD) was in yet another similarly large rectangular metal box. Connecting these various...
