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TryHackMe is an online cybersecurity training platform offering hands-on labs, guided learning paths, and real-world scenarios (rooms and challenges) to practice penetration testing, web security, and network defense in an interactive, gamified environment.
More resources on Networks & Security
Computer Networking: A Top-Down Approach
University textbook that presents networking from the application layer downward, covering HTTP, DNS, TCP congestion control, routing algorithms, link-layer protocols, and wireless. Working through it gives you a principled model of how internet traffic actually moves.
OWASP Foundation
Nonprofit foundation publishing open web application security standards and guides, including the OWASP Top Ten, the Application Security Verification Standard, the Web Security Testing Guide and the Cheat Sheet Series, used to identify, test for and prevent common web vulnerabilities.
Introduction to Cyber Security
Free eight-week FutureLearn course from The Open University on staying secure online: malware types, passwords and authentication, how networks carry data, basic cryptography, identity theft, and recovering from an attack. Learners finish able to assess personal cyber risk and write a simple security action plan.
Beej's Guide to Network Programming
A free, long-running guide by Brian "Beej" Hall to sockets programming in C, covering TCP and UDP sockets, addressing, client-server structure, and IPv4/IPv6 differences. Readers learn to write working networked programs and understand how applications use the sockets API.
The Bits and Bytes of Computer Networking
Introductory course from Google's IT Support certificate on how computer networks work, covering the five-layer TCP/IP model, Ethernet, IP addressing and subnetting, TCP and UDP, DNS and DHCP, NAT, and troubleshooting tools. Learners can explain and diagnose everyday network connectivity problems.
Cybersecurity Today
News podcast published several times a week covering current cyberattacks, ransomware campaigns, data breach disclosures and newly exploited vulnerabilities, with a weekend review show. Listeners stay aware of the live threat landscape and what defensive steps organisations are taking.