A technical guide to the security implications of putting a content delivery network (CDN) or edge computing layer between an organisation's origin infrastructure and its end users. You will learn how a CDN absorbs volumetric attacks, why origin exposure can silently undermine that protection, how cache poisoning and cache deception work and how to prevent them, why code running at the edge deserves the same review discipline as origin code, and why the account controlling CDN and DNS configuration, plus the CDN provider relationship itself, are high value targets requiring deliberate hardening and vendor risk treatment. No real CDN provider or real incident is named; every example is explicitly hypothetical.
Nothing. Every course, exam, and certificate on the catalog is free — including retakes. All you need is a free Safeguard account.
None. The flagship course, Safeguard Certified Practitioner, is a beginner-level course — basic familiarity with how software is built helps, but every exam question is answerable from the lessons themselves.
You can retake it after a 24-hour cooldown, as many times as you need. Retakes are free, and each attempt draws a fresh random set of questions.
The Safeguard Certified Practitioner credential is valid for 24 months from issue. The expiry date is printed on the certificate and shown live on its public verification page. Renewing means passing the current exam again.
