Chapter 5 Q1 What is information architecture and what is information infrastructure and how do they differ and how do they relate to each other?

IT architecture: a general plan of how IT is to be used by/within an organisation – useful for planning.

IT infrastructure – the actual implementation that will provide for effective Information Systems, including the hardware, software, services and people involved.
infrastructure is the physical hardware used to interconnect computers and users. Infrastructure includes the transmission media, including telephone lines, cable television lines, and satellites and antennas, and also the routers, aggregators, repeaters, and other devices that control transmission paths. Infrastructure also includes the software used to send, receive, and manage the signals that are transmitted.

In some usages, infrastructure refers to interconnecting hardware and software and not to computers and other devices that are interconnected. However, to some information technology users, infrastructure is viewed as everything that supports the flow and processing of information.

The difference is that IT architecture involves planning the system and IT infrastructure looks at applying it through specific means.