What is SASE? A guide for modern businesses

Cyber security and connectivity have traditionally been treated as two separate priorities. But as organisations shift to cloud platforms, support hybrid workforces and connect multiple locations, this separation is becoming a problem.

Modern businesses need something different, a way to secure users, devices and data without slowing performance or adding complexity. That’s where SASE (Secure Access Service Edge) comes in.

What is SASE?

SASE pronounced “sassy”, is a cloud-based approach that combines network connectivity and cyber security into a single, unified solution.

Instead of relying on traditional infrastructure where traffic is routed through a central data centre, SASE enables users to securely access applications directly, wherever they are.

At its core, SASE brings together technologies such as:

• SD-WAN to optimise network performance

• Cloud security services to protect users and data

• Zero trust access controls to verify identity and access

• Firewall and threat protection services.

These elements work together to create a more flexible and secure network environment.

Why are businesses moving towards SASE?

The way organisations operate has changed significantly in recent years.

• Hybrid working is now standard practice. Employees are no longer tied to one location and they access systems from home, offices and on the move

• Applications are cloud-based, tools like Microsoft 365 and SaaS platforms require fast, reliable access, supported by modern

• Cyber threats are becoming more advanced expanding attack surfaces mean businesses need integrated protection across their entire environment. Traditional network models, built around a fixed perimeter, simply weren’t designed for this reality.

What are the benefits of SASE?

• A consistent security approach: SASE ensures that every user, device and connection is protected, no matter where access takes place

• Better performance for cloud applications: Traffic is routed intelligently, reducing latency and improving user experience

• Reduce complexity: Instead of managing multiple networking and security tools, SASE brings everything together into a single platform

• Greater scalability: As businesses grow, networks can adapt quickly without needing significant infrastructure changes. This is particularly valuable for organisations looking to modernise legacy environments.

How is SASE different to traditional networking?

Traditional networks were built around a central model:

• Users connect via a corporate network

• Traffic is routed through a data centre

• Security is enforced at the perimeter.

SASE takes a completely different approach:

• Users connect directly to cloud services

• Security is applied wherever the user is located

• Traffic is optimised in real time.

The result is a network that is both more agile and more secure.

SASE vs SD-WAN: what's the difference?

This is one of the most common questions. SD-WAN focuses on improving connectivity, making sure traffic takes the best possible route. SASE goes further by adding integrated security on top of that connectivity.

In simple terms:

• SD-WAN = performance

• SASE = performance + security

How to get started with SASE

For most businesses, moving to SASE is not a single-step transition. Instead it happens gradually.

1. Upgrade your connectivity: reliable connectivity is the foundation.

2. Introduce SD-WAN: This improves network performance and flexibility.

3. Strengthen security: Add cloud-based security tools to protect users, data, and applications across your network.

4. Move to a unified SASE model: Bring everything together into a cloud-delivered solution.

The future of networking and security