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ExplanationIPsec Explained — Tunnel/Transport Modes and the IKE Key Exchange
IPsec is a family of protocols that encrypts and authenticates IP packets themselves at L3 — rather than the per-applica...
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ExplanationTCP/IP Explained — The 4-Layer Model and TCP vs UDP
TCP/IP names both 'the protocol suite that runs the Internet' and 'the four-layer reference model that organizes it'. Af...
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ExplanationVPN Explained — IPsec, OpenVPN, and WireGuard Compared
A VPN (Virtual Private Network) is the umbrella term for virtually stretching an 'encrypted private line for us only' ov...
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ExplanationThe OSI Reference Model — Seven Layers and How They Map to TCP/IP
The ISO Basic Reference Model (Open Systems Interconnection Reference Model) is the 1984 international standard that org...
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ExplanationOSINT — Methods, Tools, and Real-World Examples of Open-Source Investigation
OSINT (Open Source Intelligence) is the umbrella term for the techniques and culture of investigating people, organisati...
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ExplanationSSL/TLS Explained — How HTTPS Encrypts the Web and How Certificates Work
SSL/TLS is the protocol that gives Internet traffic confidentiality, authentication, and tamper-detection — the 'S' in H...
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ExplanationIP Addresses Explained — IPv4 / IPv6 / Subnets / Routing
IP (Internet Protocol) handles addressing and packet forwarding at the heart of the TCP/IP stack. This article walks thr...
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ExplanationDNS Explained — How Name Resolution Works and the Record Types
DNS is the distributed database that converts memorable domain names into the IP addresses computers actually use — the...
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ExplanationMetasploit Framework — How to Use It for Penetration Testing
Metasploit Framework is the open-source offensive-testing framework launched by HD Moore in 2003 and now maintained by R...
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ExplanationICMP Explained — How ping and traceroute Work and What the Message Types Mean
ICMP is the control protocol that signals errors and path conditions on IP networks. This article covers what's actually...
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ExplanationSSH — How It Works, Public-Key Authentication, and Essential Commands
SSH is the protocol for operating another computer safely over the network. It replaced cleartext protocols like Telnet,...
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ExplanationHTTP/HTTPS
HTTP/HTTPS is the protocol the World Wide Web uses to move content. This article covers the request/response structure,...
