MPLS vs WAN: Choosing the Right Network Solution

Selecting the right network architecture is a critical decision for any business managing multiple locations. Two terms that frequently come up in these discussions are Wide Area Network (WAN) and Multiprotocol Label Switching (MPLS).

While they are often compared, it's important to understand their relationship. A WAN is the broad category of network that connects your geographically dispersed sites, while MPLS is one specific technology used to build that private, high-performance network.

What is MPLS?

Multiprotocol Label Switching, or MPLS, is a networking technology that directs data from one node to the next based on short path labels rather than long network addresses. It creates a private, high-performance pathway for traffic between your office locations. Instead of relying on public internet infrastructure, MPLS uses a provider's dedicated network to forward data packets efficiently.

Key characteristics include:

• Private and Secure: It operates as a private network, separate from the public internet, which inherently adds a layer of security.
• Performance-driven: MPLS can prioritize traffic, ensuring that critical applications like voice and video get the bandwidth they need for reliable performance.
• Carrier-managed: A single telecommunications carrier typically provides and manages the entire MPLS circuit, offering a service-level agreement (SLA) for uptime and performance.

What is WAN?

A Wide Area Network, or WAN, is the umbrella term for any network that connects computers and devices over a large geographical area. Think of it as the connective tissue linking your headquarters, branch offices, data centers, and cloud services. Unlike a Local Area Network (LAN) that covers a single building, a WAN spans cities, states, or even continents.

A WAN isn't one specific type of technology but rather a concept that can be realized using several different methods. Key characteristics include:

• Geographic Scale: Its primary purpose is to link locations that are too far apart to be connected by a simple LAN.
• Diverse Connectivity: A WAN can be built using various technologies, from public broadband internet and 4G/5G to private dedicated circuits.
• Flexibility: Because it's a broad category, you can construct a WAN that is public, private, or a hybrid of both, depending on your security and performance needs.

MPLS vs WAN: Key Differences

While the two are related, their core functions and characteristics are quite different. The main distinction is that one is a broad category of network, while the other is a specific technology used to build that network.

1. Technology vs. Concept

The most fundamental difference is that a WAN is a concept, whereas MPLS is a technology. A Wide Area Network is the general term for any network that connects geographically separate locations.

MPLS is one specific method for building a private WAN. It uses a carrier's private infrastructure to forward data packets using labels, creating a dedicated path for your traffic.

2. Network Type

This leads to a key distinction in how the network operates. An MPLS network is always private and isolated from the public internet.

A WAN, however, can be private (like one built with MPLS) or public. Many WANs are built using standard business broadband connections over the public internet.

3. Performance and Reliability

Performance guarantees are another major point of contrast. MPLS circuits typically come with Service Level Agreements (SLAs) that guarantee uptime, packet delivery, and latency.

A standard internet-based WAN operates on a "best-effort" basis. This means performance can fluctuate and is not contractually guaranteed by the provider.

4. Security

Because MPLS traffic is isolated on a provider's private network, it offers a high level of inherent security. In contrast, a WAN that uses public internet connections requires additional security measures, such as VPNs, to encrypt and protect data in transit.

Benefits of MPLS

Beyond its core characteristics, MPLS offers several operational advantages for businesses managing a multi-site network, particularly when it comes to simplifying management and growth.

• Simplified Scalability: Adding a new office to the network is straightforward. Your provider can provision a new connection into the existing MPLS cloud without requiring a complex reconfiguration of your entire WAN.
• Reduced Network Congestion: By routing traffic over a private backbone, MPLS bypasses the unpredictable congestion of the public internet, resulting in more consistent application behavior and performance.
• Any-to-Any Connectivity: It naturally supports a mesh topology where any site can communicate directly with any other site, which simplifies routing and improves performance for inter-office collaboration.

Benefits of WAN

Because a WAN is a broad concept, its benefits often come from its flexibility and ability to use widely available technologies.

• Cost-Effectiveness: Using public internet connections like business broadband or fiber can be significantly more affordable than dedicated private lines, making it easier to connect numerous locations.
• Technology Flexibility: You can mix and match different connectivity types (e.g., fiber at HQ, broadband at a branch, 4G/5G for backup) to suit the specific needs and budget of each site.
• Broad Accessibility: A WAN can be established nearly anywhere with an internet connection, offering a major advantage for businesses with remote or geographically diverse offices.

Choosing Between MPLS and WAN

The right choice depends entirely on your business's specific needs for performance, security, and budget. It's less about which is "better" and more about which is the right fit for your operational requirements.

1. When to Choose MPLS

An MPLS network is the preferred option when performance and security are non-negotiable. Consider MPLS if your business depends on real-time applications like VoIP or video conferencing that require stable, low-latency connections guaranteed by an SLA.

It's also the standard for organizations that handle sensitive data, such as in finance or healthcare, where the traffic isolation of a private network is a core security requirement. If you have the budget for a premium, carrier-managed service, MPLS provides reliability and simplifies network oversight.

2. When a Broader WAN Strategy is Better

A WAN built with public internet connections is a practical choice when cost is the primary driver and your applications are not highly sensitive to performance fluctuations. This approach offers great flexibility for connecting many sites, especially if they are geographically dispersed.

This strategy also works well if most of your traffic is headed to public cloud services rather than between your own sites. For businesses that need fast, widespread connectivity without the stringent performance guarantees of MPLS, a standard internet-based WAN is often sufficient.

Final Thoughts

Understanding the distinction between WAN and MPLS is fundamental to making a sound network infrastructure decision. The key takeaway is that a WAN is the overall concept of a wide-area network, while MPLS is one specific technology used to build a private, high-performance version of it.

Your choice depends entirely on your business priorities. If you require guaranteed application performance and inherent security, MPLS is a strong contender due to its private nature and SLAs.

Conversely, if broad accessibility and cost-effectiveness are the main drivers, a WAN built with public internet connections is a practical approach. Ultimately, the right strategy is the one that best supports your specific operational and budgetary requirements.

Need Help Managing Your Network? Lightyear Can Help

Whether your business needs the guaranteed performance of MPLS or the flexibility of a different WAN strategy, the next step is procuring and managing those services effectively.

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Frequently Asked Questions about MPLS vs WAN

Can I use MPLS with other internet-based WAN connections?

Yes, absolutely. Many businesses use a hybrid WAN approach, combining MPLS for critical sites with more affordable broadband connections for others. This strategy balances performance with cost, giving you the best of both worlds.

Is MPLS becoming outdated?

Not at all. While newer technologies like SD-WAN have emerged, MPLS remains the gold standard for applications requiring guaranteed performance and high security. It is still a core component of many enterprise networks today.

How does SD-WAN fit into this?

SD-WAN is an overlay technology that intelligently routes traffic over any type of WAN connection, including MPLS and public internet. It adds a layer of management and optimization on top of your existing network infrastructure.

Which is better for accessing cloud applications?

It depends. If your cloud apps require a highly stable connection, a direct MPLS link to the cloud provider is ideal. For general cloud access, a standard internet-based WAN is often more flexible and cost-effective.