MPLS vs VPN: Choosing the Right Solution

When connecting multiple business locations, ensuring your network is secure, reliable, and fast is a top priority for any IT team. Two common technologies for building a private wide area network (WAN) are Multiprotocol Label Switching (MPLS) and Virtual Private Networks (VPN).

While both can connect your sites, they operate very differently and offer distinct advantages in performance, security, and cost. This guide will break down the key differences between MPLS and VPNs to help you decide which solution is the right fit for your organization's needs.

What is MPLS?

Multiprotocol Label Switching (MPLS) is a networking technology that service providers use to create private, high-performance connections for businesses. It works by assigning a "label" to data packets as they enter the network, which then directs them along a predetermined path.

This approach differs significantly from routing on the public internet. Here are the core mechanics:

• Private Network: MPLS circuits run on a single provider's private infrastructure, meaning your data never travels over the public internet. This creates a secure, isolated network connecting your sites.
• Label-Based Forwarding: Instead of routers performing complex IP address lookups at every stop, they simply read the packet's label to forward it to the next hop. This process is highly efficient.
• Engineered Paths: The routes traffic takes are pre-engineered by the carrier for reliability and speed. This also enables Quality of Service (QoS), allowing critical applications like voice and video to be prioritized.

What is VPN?

A Virtual Private Network (VPN) establishes a secure, encrypted connection over a public network, most commonly the internet. It essentially creates a private "tunnel" for your data, shielding it from unauthorized access as it travels between your business locations.

• Internet-Based: VPNs operate over existing public internet infrastructure. This is a fundamental difference from MPLS, which runs on a dedicated, private carrier network.
• Data Encryption: Security is achieved through strong encryption protocols (like IPsec). This process scrambles your data, making it unreadable to anyone who might intercept it.
• Accessibility and Cost-Effectiveness: Since VPNs use standard internet connections, they are typically more affordable and quicker to deploy than private MPLS lines, making them a popular choice for businesses of all sizes.

MPLS vs VPN: Key Differences

While both technologies connect your business sites, they differ significantly in how they handle performance, security, and cost. Here’s a direct comparison of the key trade-offs.

1. Performance and Reliability

MPLS delivers consistent, high-quality performance because it runs on a private, carrier-managed network. This allows for predictable latency and minimal packet loss, backed by robust Service Level Agreements (SLAs).

It also supports Quality of Service (QoS), letting you prioritize critical traffic like VoIP.

VPN performance is tied to the public internet, making it less predictable. Traffic is subject to congestion, so it operates on a "best-effort" basis without the same performance guarantees.

2. Security Model

The security models are distinct. MPLS provides security through isolation—traffic is contained within a single provider's private network and is not exposed to the public internet.

VPNs create security through strong encryption protocols like IPsec. This builds a secure tunnel for your data, but that tunnel still runs over the public internet.

3. Cost and Implementation

When it comes to cost, VPNs are more budget-friendly. They operate over standard business internet connections, which are widely available and competitively priced.

MPLS is a premium service with substantially higher monthly costs due to its private infrastructure. Deployment is also slower; MPLS circuits can take weeks or months to provision, while a VPN can be configured much faster.

Benefits of Using MPLS

While MPLS comes at a premium, it offers several distinct advantages for businesses that require guaranteed network performance and uptime. These benefits are rooted in its private, carrier-managed architecture.

• Guaranteed Performance: MPLS networks come with strong Service Level Agreements (SLAs) that guarantee uptime, latency, and packet delivery. This makes it ideal for running real-time applications like VoIP and video conferencing, where consistent quality is non-negotiable.
• Inherent Security: Because traffic travels on a private network isolated from the public internet, MPLS provides a high level of security by design. Your data is not exposed to the same threats found on public networks, reducing risk without relying solely on encryption.
• Application Prioritization: With Quality of Service (QoS), you can classify and prioritize your most important data. This ensures that critical applications always have the bandwidth they need to function smoothly, even during periods of high network traffic.
• Reduced IT Overhead: As a carrier-managed service, the provider is responsible for network monitoring, maintenance, and troubleshooting. This offloads significant operational burden from your internal IT team, allowing them to focus on other strategic initiatives.

Benefits of Using VPN

For businesses that prioritize flexibility and broad accessibility, a VPN offers a powerful and practical set of advantages. By leveraging the public internet, it provides connectivity solutions that are both agile and far-reaching.

• Cost-Effectiveness: VPNs operate over standard business internet connections, which are widely available and competitively priced. This makes them a significantly more budget-friendly option compared to dedicated private lines, both in terms of monthly costs and initial setup.
• Scalability and Flexibility: Adding a new location to your network is as simple as establishing an internet connection and configuring the VPN. This allows your network to grow with your business without the long lead times associated with provisioning private circuits.
• Secure Remote Access: Beyond connecting sites, VPNs are ideal for supporting a mobile or remote workforce. Employees can securely access company resources from anywhere with an internet connection, creating a secure environment for work-from-home or travel scenarios.
• Geographic Reach: Since VPNs run over the internet, they are not limited by a single carrier's network footprint. You can connect offices anywhere in the world, making it a great solution for geographically dispersed organizations.

Choosing Between MPLS and VPN

The right choice depends entirely on your organization's specific priorities, budget, and performance requirements. Here’s a breakdown of the typical scenarios where one technology makes more sense than the other.

1. When to Choose MPLS

MPLS is the superior option for organizations where network reliability is paramount.

Consider MPLS if your business depends on real-time applications, such as VoIP or video conferencing, that require stable, low-latency connections.

It's also the right fit for industries with strict compliance or security needs, as it keeps all traffic off the public internet.

If your budget can accommodate a premium service for guaranteed uptime and performance, MPLS provides that peace of mind.

2. When to Choose VPN

On the other hand, a VPN is often the more practical solution for businesses that need flexibility and have a close eye on costs.

Choose a VPN if you need to connect a large number of sites across a wide geographic area or support a remote workforce.

Its ability to run over any standard internet connection makes it quick to deploy and easy to scale as your business grows.

While it doesn't offer the performance guarantees of MPLS, it provides strong security through encryption at a much lower price point.

3. Considering a Hybrid Model

It's important to remember that this isn't always an either/or decision. Many businesses find success with a hybrid network architecture.

In this setup, you might use MPLS to connect your most critical locations, like your headquarters and data centers, where performance is essential.

Smaller branch offices, retail locations, or individual remote users can then connect to the network using cost-effective VPNs.

This approach allows you to balance performance, security, and cost across your entire network infrastructure.

Final Thoughts on MPLS and VPN

Choosing between MPLS and VPN ultimately comes down to your organization's specific needs. Both technologies are effective at creating a private network, but they solve the problem in fundamentally different ways.

MPLS offers guaranteed performance and security through a private, carrier-managed network, making it the standard for businesses that cannot compromise on reliability for critical applications.

In contrast, VPN provides a secure, encrypted connection over the public internet, offering a flexible and cost-effective solution for geographically diverse or budget-conscious organizations.

Many businesses also adopt a hybrid approach, using MPLS for core sites and VPNs for smaller branches. The best decision starts with a clear evaluation of your application performance requirements, security posture, and overall budget.

Need Help Managing Your Network? Lightyear Can Help

Whether you choose MPLS, VPN, or a hybrid approach, Lightyear helps you procure and manage your network with ease. By automating service procurement, inventory management, and bill consolidation, we take the pain out of telecom infrastructure management.

The hundreds of enterprises who trust Lightyear achieve over 70% time savings and 20% cost savings on their network services.

Schedule a demo or get started with our questionnaire today.

Frequently Asked Questions about MPLS vs VPN

Can I use both MPLS and VPN together?

Yes, this is known as a hybrid WAN. Businesses often use MPLS for critical sites requiring guaranteed performance, like headquarters or data centers. VPNs are then used to connect smaller branch offices or remote workers cost-effectively over the public internet.

Does VPN encryption slow down my connection?

While encryption adds a small amount of processing overhead, modern hardware handles it with minimal impact on speed for most business applications. The primary factor affecting VPN performance is usually the quality and bandwidth of the underlying internet connection itself.

Is MPLS becoming obsolete with the rise of SD-WAN?

Not necessarily. While SD-WAN offers more flexibility by routing traffic over various connections, many businesses still rely on MPLS for its unmatched reliability. SD-WAN often complements MPLS rather than completely replacing it, especially in a hybrid network design.