A small to medium sized software development firm, specialising in the development of mobile banking apps, has recently moved to a bigger premises. In their previous premises, security was compromised after a mobile device belonging to a customer was able to join the company network, allowing them access to sensitive data.

With moving to the new premises, the system administrator is taking a defence-in-depth approach to the redesign of the network and has asked you for help. Due to the sensitive nature of their work, the firm chooses not to rely on any external cloud-based services.

• a.The firm currently comprises four departments:
• Sales
• IT
• Research & Development
• Admin
  • i.Considering the four existing departments, describe how a segmented approach can aid in the design of a secure network.

Use no more than 70 words for this question.

(4 marks)