Infrastructure requirements

Answer: ISO 27001 does not prescribe specific infrastructure and system requirements to support an Information Security Management System. These should be identified based on the organizational context, ISMS purpose and results of risk assessment.

These articles will provide you further explanation about ISMS requirements:
- WHAT IS ISO 27001 https://advisera.com/27001academy/what-is-iso-27001/
- How to identify ISMS requirements of interested parties in ISO 27001https://advisera.com/27001academy/blog/2017/02/06/how-to-identify-isms-requirements-of-interested-parties-in-iso-27001/
- How to set security requirements and test systems according to ISO 27001https://advisera.com/27001academy/blog/2016/01/11/how-to-set-security-requirements-and-test-syste ms-according-to-iso-27001/
- Requirements to implement network segregation according to ISO 27001 control A.13.1.3 Requirements to implement network segregation according to ISO 27001 control A.13.1.3

These materials will also help you regarding ISMS requirements:
- Book Secure & Simple: A Small-Business Guide to Implementing ISO 27001 On Your Own https://advisera.com/books/secure-and-simple-a-small-business-guide-to-implementing-iso-27001-on-your-own/
- Free online training ISO 27001 Foundations Course https://advisera.com/training/iso-27001-foundations-course/