An honest, scoped account of which Open Systems Interconnection (OSI) layers a software supply chain security platform actually observes: application and application programming interface testing at layer seven, external attack surface management across layers three through seven, runtime and workload protection at the host and process boundary, and software composition analysis with the package firewall acting before code ever runs. The course states plainly, and more than once, which layers belong to network and infrastructure tooling instead, and closes with the organisational judgement that still determines whether accurate coverage translates into real value.
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.
