Home/ Comparisons

Comparisons

Side-by-side technical comparisons of DNS, TLS, HTTP, and email authentication technologies. Understand the trade-offs and choose the right option for your infrastructure.

DNS

A Record vs CNAME - When to Use Which

A records map domains to IP addresses. CNAME records create aliases to other domains. Learn the key differences and zone apex rules.

DNS over HTTPS vs DNS over TLS

DoH hides DNS in HTTPS on port 443; DoT uses dedicated port 853. Privacy vs control.

IPv4 vs IPv6

32-bit vs 128-bit addresses, A vs AAAA records. Dual-stack is the norm today.

TLS

TLS 1.2 vs TLS 1.3 - Performance and Security Differences

TLS 1.3 is faster (1-RTT handshake) and more secure (removed weak ciphers). Compare the two versions and check which your server negotiates.

OCSP vs CRL - Certificate Revocation Methods Compared

CRL caches revoked serials; OCSP queries per-cert status. Soft-fail and stapling.

HTTP

HTTP vs HTTPS - Encryption, Trust, and Why HTTPS Is the Default

HTTPS adds TLS to HTTP: encryption, integrity, server authentication. Ports 80 vs 443.

HTTP/2 vs HTTP/3 - What Changes and Why It Matters

HTTP/3 replaces TCP with QUIC for faster connections and no head-of-line blocking. Compare HTTP/2 and HTTP/3 protocol differences.

HSTS vs HSTS Preloading - The Preload Trade-off

HSTS tells browsers to use HTTPS after the first visit. Preloading hardcodes it into browsers so even the first visit is protected.

301 vs 302 Redirect - Permanent vs Temporary

301 is permanent and cacheable; 302 is temporary. SEO and caching consequences.

Email Auth

SPF vs DKIM vs DMARC - What Each Does and Why You Need All Three

SPF authorizes senders, DKIM signs messages, DMARC enforces policy. Learn the differences and how they work together.