What is the difference between an information architecture and an information technology infrastructure?

Information Architecture is a field and approach to designing clear, understandable communications by giving care to structure, context, and presentation of data and information. Particularly refers to websites and intranets, including labelling and navigation schemes. An information technology infrastructure however, is the base or foundation for the delivery of information to support programs and management (of an agency for example). The infrastructure contains elements upon which an agency's information technology activities are dependent. An agency must therefore define, implement, and manage these infrastructure elements to successfully employ information technology.