Networking References

DNS, IP addressing, transport, and the protocols that make the Internet route. Plain-English explanations with links to the canonical RFCs.

9 references RFC-cited

DNS

DNS

DNS Record Types

A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA — semantics and examples.

 SEC

DNSSEC

How DNS Security Extensions sign zones and verify authenticity.

IP Addressing

v4/6

IPv4 vs IPv6

Address format, header changes, NAT, and why the migration matters.

 /24

CIDR Notation

Classless Inter-Domain Routing — slash notation and aggregation.

 SUB

Subnetting Guide

Splitting a network into smaller logical networks — masks and ranges.

Transport & Security

:80

Common Network Ports

TCP and UDP ports for the services engineers actually meet.

 TLS

TLS Handshake

Cipher negotiation, certificates, key exchange. TLS 1.2 and 1.3 walk-throughs.

 CDN

CDN Basics

How content delivery networks cache and route at the edge.

 SSH

SSH Protocol

Transport, user authentication, and connection layers of the Secure Shell protocol.

Related tools and references

IP Subnet Calculator // tools URL Parser // tools SSH Key Authentication // security Public Key Infrastructure // security HTTP/3 and QUIC // protocols HTTP Headers Reference // web-development

External authority sources