DNS Basics Articles
Use these articles when you want a clearer mental model of how DNS records, nameservers, and resolution behavior fit together before making live changes.
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DNS Basics
What Is an SRV Record in DNS?
Learn what an SRV record is, how service, protocol, priority, weight, and port fields work, and when SRV lookups are useful in real deployments.
How to Read MX Records and Mail Priorities
A comprehensive guide to MX records. Learn how MX records work, how priority is calculated, how mail routing functions, and how to troubleshoot delivery issues.
What are glue records?
Learn what glue records are, when they are required, and why they are critical for keeping in-bailiwick nameserver delegation resolvable.
What Are TXT Records in DNS?
Learn what DNS TXT records are, how they are used for verification and email authentication, and what to check when TXT records fail.
What is a CNAME record?
A practical reference guide to CNAME records, including what the alias target means, common examples, and where CNAMEs can cause confusion.
What is a DNS record?
A practical reference guide to DNS records, including what they contain, what common fields mean, and how different record types are used in real DNS setups.
What is a PTR record?
Learn what PTR records are, how reverse DNS works, and why accurate PTR validation matters for mail delivery, logging, and network trust.
What is a TXT record?
Learn what a DNS TXT record is used for, what TXT records look like, and why they are so common in verification and email security setups.
What Is an A Record? DNS A Record Explained
Learn what an A record is, how it maps a hostname to an IPv4 address, where it is used, and how to troubleshoot common A record issues.
What Is an AAAA Record? DNS AAAA Record Explained
Learn what an AAAA record is, how it maps a hostname to an IPv6 address, when to use it, and how to troubleshoot common AAAA record issues.
What is an NS record?
Learn what NS records do, how nameserver delegation works, and how to troubleshoot DNS authority and resolution issues in real-world setups.
What is DNS propagation?
Learn what DNS propagation means, why different resolvers may show different answers, and what to check during a DNS change.
What Is DNS? Domain Name System Explained
Learn what DNS is, how DNS resolution works, what common record types do, and why DNS is essential for websites, email, and online services.
What Is DNSSEC? DNS Security Extensions Explained
Learn what DNSSEC is, how DNSKEY and DS records work together, and why DNSSEC matters for protecting DNS integrity and trust.