DNS is a critical piece of infrastructure used to facilitate communication across networks. It’s often described as a phonebook: in its most basic form, DNS provides a way to look up a host’s address by an easy-to-remember name. For example, looking up the domain name stripe.com will direct clients to the IP address 53.187.159.182, where one of Stripe’s servers is located. Before any communication can take place, one of the first things a host must do is query a DNS server for the address of the...