In 2025, 43% of large companies have already implemented Zero Trust security principles, and another 46% are in the process of adoption, according to a January 2025 Expert Insights survey.
This scenario shows that the model is no longer just a concept but has become a concrete reality for most organizations—which reinforces the urgency of understanding how to apply a Zero Trust Network in practice to reduce critical risks.
With the expansion of distributed environments, remote work, and the adoption of hybrid clouds, traditional perimeters have ceased to exist. Now, it’s up to IT managers and analysts to answer: How to structure a Zero Trust network in a practical, gradual, and efficient way, ensuring resilience and operational continuity?
Why the Traditional Network Is No Longer Secure by Default
Most corporate network architectures are still based on a trusted perimeter, with limited control within the internal network. This means that once inside the network, users and systems have broad access, an ideal scenario for lateral movements by attackers and internal threats.
The Zero Trust Network, on the other hand, starts from the principle that no device, user, or service should be trusted by default, not even within the network itself.
Comparison: Traditional Network vs. Zero Trust Network
| Feature | Traditional Network | Zero Trust Network Architecture |
| Trust | Implicit after initial authentication | Never presumed, validated at each request |
| Segmentation | Limited or non-existent | Microsegmentation by function/context |
| Visibility | Partial | Total and in real-time |
| Access Policies | Static and generic | Dynamic, based on risk and context |
| Threat Response | Reactive | Proactive, automated, and contextualized |
Zero Trust Network in Practice: Pillars for Your Company
Implementing a Zero Trust Network Architecture (ZTNA) requires more than just adopting tools; it requires transforming the network structure so that it responds to risks in real-time, is segmented by function, and integrates continuous identity and context validations.
Technical pillars for building a Zero Trust Network:
- Continuous and Adaptive Authentication: Constant validation of identity, location, device, and risk.
- Network Microsegmentation: Separation of environments by function, criticality level, and exposure.
- End-to-End Visibility (East-West): Control over lateral traffic and granular monitoring of internal communications.
- Least Privilege Access: “Need-to-know” policy, with continuous review of permissions.
- Integration with Solutions like EDR, NDR, SIEM, and SOAR: To automatically detect and respond to anomalies.
Best Practices for Applying a Zero Trust Network in Corporate Environments
Adopting the Zero Trust Network architecture requires a strategic vision and gradual action. The ideal is to start with critical areas and scale as the organization matures. Here’s how:
- Mapping assets and data flows between systems.
- Implementing access policies based on identity and context.
- Creating isolated domains within the network (micro-perimeters).
- Monitoring internal traffic with NDR/UEBA tools.
- Applying strong authentication and logical segmentation by application.
Zero Trust Network: A Strategic Decision to Protect What Really Matters
Adopting a Zero Trust Network is a strategic business decision. This architecture allows you to respond with intelligence, visibility, and control, even in the face of hybrid, multi-user, and highly complex environments. By implementing a zero-trust-based network, your company takes a decisive step toward ensuring operational continuity, compliance, and critical data security.
Do you want to know where to start?
Talk to an Altasnet specialist and discover how to implement a Zero Trust Network aligned with your environment, your strategy, and your level of technological maturity.
