Reid is a network security trainer for a mid$-$sized company. He is demonstrating alternative methods of protecting a network using unconventional means. The IT department's $$sandbox$$ network is used for testing and is not connected to the production network. Using the sandbox, Reid shows how to protect a network from external threats without using a firewall. What is Reid's approach?

Question $11$ options:

Intrusion detection system$/$intrusion protection system $($IDS$/$IPS$)$

Packet sniffer

Router

Switch