30 Appendix B: Further reading

The protocol is defined across many RFCs. A productive sequence is:

• RFC 1034, Domain Names—Concepts and Facilities.
• RFC 1035, Domain Names—Implementation and Specification.
• RFC 2181, clarifications including RRset and credibility rules.
• RFC 2308, negative caching.
• RFC 6891, Extension Mechanisms for DNS (EDNS(0)).
• RFC 7766, DNS over TCP requirements.
• RFC 4033, RFC 4034, and RFC 4035, DNSSEC.
• RFC 5155, NSEC3.
• RFC 5936, AXFR.
• RFC 1982, serial number arithmetic.

Implementation and operational references:

• The djbdns documentation: https://cr.yp.to/djbdns.html
• TAI64N format and tools: https://cr.yp.to/daemontools/tai64n.html
• s6 overview: https://skarnet.org/software/s6/overview.html
• s6-rc overview: https://skarnet.org/software/s6-rc/overview.html
• runit benefits: https://smarden.org/runit/benefits.html
• systemd project documentation: https://systemd.io/
• Hickory DNS: https://hickory-dns.org/