What happens if I fail the exam?

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.

How long is a certificate valid?

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.

Courses

Data Communications Foundations: Networks, Models and Standards

BeginnerFree5 modules · 15 lessons

About this course

A ground-up introduction to how networks actually work: what a network is, how it is classified by scale and by relationship, how independent parties agree on shared protocols, and how the Open Systems Interconnection model and the Transmission Control Protocol/Internet Protocol suite organise it all into layers. The course closes with addressing across those layers and an honest first look at what a foundational understanding of networking buys a security engineer.

What you'll learn

What a Network Is

Data Communications and the Anatomy of a Network
What Makes a Network Good: Performance, Reliability and Security
Network Topologies: Mesh, Star, Bus, Ring and Hybrid

Network Types and Categories

Networks by Scale: Personal, Local, Metropolitan and Wide Area
Networks by Relationship: Client-Server, Peer-to-Peer and the Hybrid Cloud Pattern
How Networks Interconnect: Access Networks, Internet Service Providers and the Backbone

Protocols and Standards

What a Protocol Actually Is: Syntax, Semantics and Timing
Standards Bodies: De Facto, De Jure, and Who Actually Decides
How an Internet Standard Gets Made: The Request for Comments Process

Layered Models

Why Layer at All: The Case for Breaking a Hard Problem Into Smaller Ones
The OSI Seven-Layer Model and the TCP/IP Suite, Mapped Against Each Other
Encapsulation and Decapsulation: A Worked Walkthrough

Addressing Across Layers and the Security Thread

Addressing at Every Layer: Physical, Logical, Port and Name
The Security Thread: What an Attacker Targets at the Foundational Layer, and What Defends It
Where Safeguard Fits, and Where It Honestly Does Not

01What a Network Is3 lessons

Data Communications and the Anatomy of a Network
What Makes a Network Good: Performance, Reliability and Security
Network Topologies: Mesh, Star, Bus, Ring and Hybrid

02Network Types and Categories3 lessons

Common questions

How much does Safeguard Academy cost?

Nothing. Every course, exam, and certificate on the catalog is free — including retakes. All you need is a free Safeguard account.

What are the prerequisites?

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.