DNS is the internets backbone, the network before the network. It was designed to solve the problem of knowing how to route email between disparate internet hosts. DNS was built to simply answer questions to establish a connection, but that also leaves it susceptible. DNS caches can be poisoned by viruses, causing domain lookups to go to the wrong IP address. Oft-neglected DNS infrastructure often requires time-consuming and risky manual changes, which can consume network professionals time.”]
Source: https://www.csoonline.com/article/3287154/whats-missing-from-dns-in-the-enterprise.html