There will be over 75 billion IoT devices in use by 2025, every one with a unique IP address that can only be resolved by wait for it DNS. In 2017, CSO reported on an unnamed US university where over 5,000 IoT-connected vending machines and lightbulbs were commandeered, leading to a DDoS attack. DNS can be taken hostage becoming a messenger for DNS tunneling, cache poisoning, and spoofing attacks, all of which can lead to data exfiltration.”]