References

1. I can also tell you from experience that the phrase "sub-delegation" is often used. I have it on good authority (namely, every single tech reviewer of this book) that this phrase is redundant and confusing. I should also admit to having used it until now.
2. Anestis Karasaridis, DNS Security: In Depth Vulnerability and Mitigation Solutions.
3. https://www.theregister.co.uk/2018/04/24/myetherwallet_dns_hijack/
4. If the nameserver is configured with minimal-responses enabled, the authoritative nameserver will only populate the AUTHORITATIVE SECTION in the case of referrals or when the data is otherwise required. The rationale behind this is to optimize performance.
5. https://tools.ietf.org/html/draft-dnsop-refuse-any-00
6. What we are talking about here may sound similar to Response Rate Limiting (RRL), but it isn't. We will look at RRL in Chapter 14, DNS and DDoS...