A practical tour of how traffic actually moves between endpoints: dedicated circuits, packet switching in its datagram and virtual circuit forms, and the switch fabrics that make either one work. The course closes at the carrier access network and the last mile, then draws an honest line around what belongs to a network security team versus what belongs to Safeguard's software supply chain focus.
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.
