What is Managed SD-WAN? How It Works, Features & Key Differences

It’s quite clear that the outsourcing of managed IT services to third parties tasked with the 24/7 maintenance, security, and affordable upkeep of IT infrastructure and cloud computing has been nothing short of a miracle for firms of all sizes. Perhaps ‘peace of mind’ should be the operative term every provider should use to market themselves.

Yet as a small business trying to engage with these services for the first time, it can feel somewhat dizzying to figure out what the jargon means, how it applies to your business, and what you should be paying for. In this post, we’ll discuss what Managed SD-WAN services are and how you may wish to integrate them.

What is Managed SD-WAN?

SD-WAN stands for ‘software-defined wide area network,’ which refers to a means of delivering managed software orchestration as part of an IT managed service.
This serves as a virtualized WAN connection that incorporates all existing network connections as an overlay. In effect, it helps the management of the network remain simplified, as data packets are sent through the most optimized and security-conscious processes possible. This means that enterprises can more easily administratively control all network traffic through a single, unified dashboard.

What Does SD-WAN Do?

Some of the most popular uses for SD-WAN include increasing WAN capacity by integrating both public and private network services, also known as dual connectivity. This means that a firm can reserve private network potential for business-essential or low latency applications. Cloud migration is also a big utility worth considering here, as application-based routing is now possible through this service. Of course, SD-WAN also unlocks geographic expansion through these means, too.

Is SD-WAN the same as a VPN?

VPN’s are generally designed to send traffic over an isolated network link, while SD-WAN-enabled optimized traffic which routes many different packages. In other words, SD-WAN is a combination and collection of technologies that use a competent graphics interface to ensure VPN connectivity between remote locations is simpler, easier, and generally cuts costs much more effectively.

How Does Managed SD-WAN Work?

Managed SD-WAN works by combining intelligent software, centralized control, and providing managed services to deliver a more efficient, reliable, and scalable network. Instead of relying on traditional hardware-based networking, it uses a software-defined approach to manage traffic across multiple connections dynamically.

1. Overlay Network Creation

At the core of managed SD-WAN is an overlay network that operates on top of existing infrastructure such as MPLS, broadband, or LTE. The service provider deploys SD-WAN edge devices at each branch, data center, or cloud environment.

These devices establish secure, encrypted tunnels between sites, creating a virtual network that functions independently of the underlying physical connections.

2. Centralized Control and Orchestration

A centralized controller managed by the provider oversees the entire network. It continuously monitors performance and enforces policies across all locations.

Instead of configuring each device manually, administrators define rules—such as traffic prioritization or security policies—once and have them automatically applied across the network.

3. Intelligent Path Selection

Managed SD-WAN continuously evaluates link performance, including latency, jitter, and packet loss. Based on real-time conditions, it dynamically selects the most efficient path for each traffic type.

For example:

• Video calls are routed through low-latency links.
• Backup traffic may use lower-cost broadband connections.

If network conditions change, traffic is instantly redirected without disrupting the user experience.

4. Application-Aware Routing

The system identifies applications and prioritizes them based on business importance. Critical applications such as CRM or ERP systems receive higher priority, while less important traffic is deprioritized. This ensures consistent performance for essential services, even during peak usage.

5. Built-in Security Layer

Security is integrated directly into the SD-WAN architecture. All data is encrypted, and additional protections—including firewalls, secure gateways, and intrusion prevention systems—are in place.

This reduces reliance on separate security appliances and strengthens overall network protection.

6. Continuous Monitoring and Optimization

The managed service provider monitors the network 24/7 using advanced analytics and performance insights. This enables early issue detection, proactive optimization, and consistent SLA compliance.

If an issue arises, the provider handles troubleshooting and resolution—often before it impacts users.

7. Automated Failover and High Availability

If a connection fails or degrades, SD-WAN automatically switches traffic to an available link. This process is seamless, ensuring minimal downtime and uninterrupted operations.

Key Features of Managed SD-WAN

Managed SD-WAN extends beyond basic connectivity by combining intelligent networking with expert management. Key features include:

Centralized Network Management

A single dashboard provides visibility and control across the entire network. This simplifies operations and reduces administrative overhead.

Intelligent Traffic Routing

Traffic is automatically directed along the most efficient path based on real-time conditions such as latency, packet loss, and bandwidth availability. This ensures optimal performance for critical applications like VoIP and cloud services.

Application-Aware Policies

The system identifies applications and applies tailored policies. Business-critical applications are prioritized, while non-essential traffic is limited to maintain performance.

Built-in Security

Security is embedded within the network and typically includes:

• End-to-end encryption
• Secure VPN tunnels
• Firewall integration
• Intrusion detection and prevention

This reduces the need for multiple standalone security solutions.

Multi-Connection Support

Managed SD-WAN supports multiple connection types, including MPLS, broadband, LTE, and 5G. It dynamically switches between them to maintain uptime and reliability.

Zero-Touch Provisioning

New locations can be deployed quickly without on-site IT support. Devices are pre-configured and automatically download settings upon connection.

Real-Time Monitoring and Analytics

Advanced analytics provide visibility into network performance, application usage, and user experience, enabling proactive decision-making.

High Availability and Failover

Traffic is automatically rerouted if a connection fails, ensuring continuous business operations.

Quality of Service (QoS) Optimization

QoS prioritizes bandwidth allocation based on business needs, ensuring consistent performance for critical services.

Managed Services and 24/7 Support

Managed SD-WAN includes continuous monitoring, maintenance, and expert support. Providers handle updates and troubleshooting, allowing businesses to focus on core operations.

DIY SD-WAN vs. Managed SD-WAN: Key Differences

Choosing between DIY and managed SD-WAN depends on the level of control, expertise, and resources your organization can commit. While both approaches offer the core benefits of SD-WAN, they differ significantly in deployment, management, and responsibility.

Aspect	DIY SD-WAN	Managed SD-WAN
Deployment & Setup	Handled by in-house IT; requires planning and configuration	Fully managed by the provider; faster deployment
Network Management	Internal monitoring and troubleshooting	24/7 provider-managed monitoring
Expertise Required	Requires skilled professionals	No in-house expertise needed
Cost Structure	Lower upfront cost but higher operational expenses	Predictable subscription-based pricing
Security Management	Managed internally; risk of misconfiguration	Provider-managed with regular updates
Scalability	Manual scaling with effort and time	Easily scalable with provider support
Performance Optimization	Depends on the internal team	Continuously optimized by the provider
Control & Customization	Full control	Limited control but simplified management
Risk & Responsibility	Fully owned by the organization	Provider accountable via SLAs
Support & Maintenance	Internal IT responsibility	24/7 provider support

Frequently Asked Questions

The most frequently asked questions we hear regarding these topics are::

1. What is Software-Defined WAN?

Software-defined WAN allows distributed organizations with many different branch offices the means to improve application performance and communication by using multiple WAN circuits to route traffic. This uses wireless 4g, 5g technologies, the MPLS, and standard internet connections to achieve this result.

2. What is SD-WAN as a service?

SD-WAN as a service is where you, as the end customer, is responsible for the monitoring and management of changing the WAN service via a management portal based in the cloud. This is opposed to managed SD-WAN, in which the provider takes care of the backend.

3. What are the benefits of using SD-WAN?

You will gain the benefits of ensuring the latest functionalities and compatibilities while still being able to easily upgrade, with autonomy, from the cloud.

4. What are the benefits of a managed service?

Peace of mind. Having your SD-WAN managed by a secure and trustworthy provider allows you to outsource the headaches of providing access to your data centres and servers.

5. What are the leading managed SD-WAN providers?

ExertNetwork, as well as some of the larger providers such as Comcat, Verizon, AT&T and more.

6. What are the benefits of using us?

We handle every step of the process while still allowing you to make adjustments and consult with how your SD-WAN is handled as appropriate. This means you have no products to buy, no inventory to maintain, and no upgrading, patches, deployments, testing, monitoring, or management to worry about. It just works.