Copyright (C) 2017  Internet Systems Consortium, Inc. ("ISC")

This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
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ns1 is the root server.

ns2 and ns5 are both authoritative servers.

ans3 is a mock authoritative server that can return various broken
responses.

ans4 is a mock authoritative server that can return CNAME or DNAME
responses of arbitrary size in arbitrary order.

ns7 is the resolver under test.