(a) Explain how the different levels of access for the users of this LAN could be implemented. [6]
(b) (i) Suggest one communications link that would provide high‑speed internet access for the school. [2]
(ii) Suggest two measures to protect the school’s LAN from external network security threats. [4]
(c) List three problems that might result from providing email access to all students and teachers. [3]