What is Network-as-a-Service (NaaS)? A complete guide for enterprises

Key takeaways

• Network as a Service (NaaS) delivers networking capabilities through a subscription-based model, eliminating the need for extensive on-premises infrastructure.

• NaaS enables businesses to scale bandwidth, deploy new sites, and connect cloud environments on demand.

• Software-defined networking and automation simplify network management while improving performance and resilience.

• Organisations benefit from lower capital expenditure, faster deployments, and greater flexibility for hybrid and multi-cloud environments.

• Tata Communications provides enterprise-grade network as a service solutions that combine global connectivity, automation, and managed services to help businesses modernise their networks.
  

What is Network-as-a-Service (NaaS)?

Network as a Service (NaaS) is a cloud-based model that delivers networking capabilities on demand through a subscription-based service. Instead of investing in networking hardware, organisations can scale connectivity as needed while reducing infrastructure costs. Modern Network as a Service solutions combine connectivity, automation, security, and centralised management, enabling businesses to build agile, scalable, and cloud-ready enterprise networks.

How did NaaS evolve from traditional networking?

Enterprise networking has evolved to keep pace with cloud adoption, hybrid working, and growing digital demands. Unlike traditional networks built for centralised data centres, Network as a Service (NaaS) offers a more flexible and scalable approach to enterprise connectivity.

The limitations of legacy WAN, MPLS and VPN infrastructure

Traditional WAN, MPLS, and VPN networks were designed for fixed environments. Expanding these networks often required expensive hardware, lengthy provisioning and complex management, making it difficult for organisations to scale quickly or support changing business needs.

Why cloud adoption made traditional networks inefficient

As applications moved to public clouds and SaaS platforms, routing traffic through central data centres became inefficient. This increased latency, raised bandwidth costs, and affected application performance. Modern network as a service architecture enables secure, direct connectivity between users, cloud platforms, and business locations.

The shift from CapEx to OpEx in enterprise networking

Rather than investing heavily in networking infrastructure, organisations now prefer subscription-based models. Network as a Service reduces upfront costs, improves financial flexibility, and allows businesses to scale networking resources on demand while freeing IT teams to focus on innovation instead of infrastructure management.

How does NaaS work?

Network as a Service (NaaS) delivers networking capabilities through software, automation, and cloud-based management instead of traditional hardware. This subscription-based approach allows organisations to provision, monitor, and scale network resources on demand, simplifying operations while supporting secure and flexible enterprise connectivity.

Software-defined networking as the foundation

Software-Defined Networking (SDN) is the core technology behind NaaS. It enables administrators to manage network traffic through software rather than manually configuring hardware devices. This improves network agility, automates routing, optimises traffic flow, and allows businesses to scale network resources quickly as requirements evolve.

The role of the NaaS provider

Network as a service providers manage the underlying networking infrastructure, ensuring secure connectivity, high availability, and continuous network performance. Many providers also offer integrated security, automation and centralised management, reducing operational complexity and allowing internal IT teams to focus on strategic business priorities.

Self-service provisioning and on-demand connectivity

A key advantage of NaaS is its ability to deliver networking resources whenever they are needed. Through self-service portals or APIs, organisations can deploy new connections, increase bandwidth and connect cloud environments quickly. This flexible network as a service architecture enables faster deployments, supports business growth and adapts easily to changing operational requirements.

NaaS vs. traditional networking

While both approaches provide business connectivity, they differ significantly in deployment,  management, and scalability.

NaaS vs. other "As-a-Service" models

Although Network as a Service (NaaS) belongs to the growing family of cloud-based service models, it serves a different purpose from Infrastructure-as-a-Service (IaaS), Software-as-a-Service (SaaS) and Platform-as-a-Service (PaaS). Understanding these differences helps organisations choose the right service for their business needs.

NaaS vs. IaaS

NaaS vs. SaaS

NaaS vs. PaaS

Key benefits of NaaS for enterprises

As businesses embrace cloud-first strategies, Network as a Service (NaaS) offers a more flexible and efficient approach to enterprise networking. It simplifies network management while improving scalability, security and application performance across distributed environments.

• Cost efficiency: Reducing CapEx and Optimising OpEx: Network as a service solutions eliminate large upfront infrastructure investments by offering a subscription-based model, helping organisations reduce hardware costs and improve budget flexibility.

• Scalability and elastic bandwidth: NaaS allows businesses to scale bandwidth on demand, ensuring the network adapts quickly to changing workloads, seasonal demand and business growth.

• Simplified network management: Centralised management, automation and proactive monitoring reduce administrative effort, enabling IT teams to focus on innovation instead of routine maintenance.

• Improved application performance and low latency: Intelligent traffic routing ensures faster, more reliable access to cloud applications while minimising latency and improving user experience.

• Enhanced security and built-in redundancy: A modern network as a service architecture includes integrated security, encrypted connectivity and resilient network design to strengthen protection and support business continuity.

• Faster deployment and time to market: Organisations can rapidly deploy new sites, connect cloud services and provision bandwidth without lengthy installation processes.

• Flexibility for hybrid and multi-cloud environments: Network as a service provides seamless connectivity across data centres, cloud platforms, branch offices and remote users through a unified networking framework.

What does NaaS replace?

As organisations modernise their infrastructure, Network as a Service (NaaS) is gradually replacing several traditional networking technologies. Rather than relying on multiple standalone networking solutions, businesses can consolidate connectivity through a flexible, software-defined service model.

MPLS connections

MPLS has long been the preferred option for enterprise connectivity, but it can be expensive and slow to scale. NaaS provides a more flexible alternative by enabling secure, high-performance connectivity that can be provisioned and adjusted as business requirements change.

Hardware-based firewalls and load balancers

Traditional networking relies heavily on dedicated hardware appliances to manage security and traffic distribution. Modern network as a service architecture increasingly delivers these capabilities through software, simplifying deployment, reducing infrastructure costs and improving operational flexibility.

Legacy VPNs

Conventional VPNs were designed to connect users to central office networks. As applications move to the cloud and employees work from multiple locations, many organisations are replacing legacy VPNs with more scalable, cloud-native networking solutions that deliver secure connectivity with improved user experiences.

NaaS and SASE:  How they work together

Although they serve different purposes, Network as a Service (NaaS) and Secure Access Service Edge (SASE) complement one another.

NaaS provides the networking foundation by delivering secure, scalable connectivity between users, cloud platforms and business locations. SASE builds on that foundation by combining networking with cloud-delivered security services such as Zero Trust Network Access (ZTNA), Secure Web Gateway (SWG), Firewall-as-a-Service (FWaaS) and Cloud Access Security Broker (CASB).

Together, they enable organisations to deliver consistent security and application performance regardless of where users, devices or workloads are located. This integrated approach is particularly valuable for businesses adopting hybrid working, cloud-first strategies and globally distributed operations.

Challenges of adopting NaaS

While Network as a Service (NaaS) simplifies enterprise networking, organisations should consider a few challenges before adopting the model. Careful planning helps maximise benefits while ensuring a smooth transition from traditional infrastructure.

• Vendor dependence and lock-in risk: Relying on a single network as a service provider may reduce flexibility. Organisations should evaluate scalability, interoperability and long-term support before selecting a provider.

• Compatibility with legacy infrastructure: Integrating NaaS with existing networking systems can be complex and may require a phased migration strategy.

• Security responsibilities in a shared model: Although providers manage the network infrastructure, organisations remain responsible for user access, data protection and security governance.

• Customisation limitations for complex enterprises: Some network as a service solutions may offer limited customisation, making it important to assess whether they meet specific business and operational requirements.

Network as a Service use cases by industry

As businesses accelerate digital transformation, Network as a Service (NaaS) is helping organisations build secure, scalable and cloud-ready networks. Its flexibility makes it suitable for industries that rely on reliable connectivity and high application performance.

• Manufacturing: Network as a Service solutions connect factories, IIoT devices and production systems, enabling predictive maintenance, improved supply chain visibility and efficient communication across manufacturing operations.

• Banking and Financial Services: NaaS delivers secure, low-latency connectivity for digital banking, payment processing and trading platforms while supporting compliance and business continuity.

• Retail and Consumer Goods: Network as a service connects stores, warehouses and e-commerce platforms, enabling real-time inventory management, seamless customer experiences and efficient retail operations.

• Media and Entertainment: A modern network as a service architecture supports high-speed content transfer, collaborative production workflows and reliable live streaming across distributed teams.

• Global Enterprises with Distributed Workforces: NaaS enables secure connectivity for branch offices, remote employees and cloud applications, improving collaboration, productivity and network performance across global business operations.

What to look for in a NaaS provider

Selecting the right network as a service provider is essential for building a secure, scalable and future-ready enterprise network. Organisations should evaluate providers based on their ability to deliver reliable connectivity, strong security and seamless cloud integration.

• Global network reach and PoP coverage: A wide global network and strategically located PoPs help reduce latency and improve application performance.

• Uptime SLAs and built-in redundancy: Strong SLAs and resilient infrastructure ensure high availability and minimise network downtime.

• Security certifications and compliance support: Choose providers that offer enterprise-grade security controls and support recognised compliance standards.

• API and automation capabilities: APIs enable automated provisioning, faster deployments and simplified network management.

• Multi-cloud and hybrid cloud integration: Leading network as a service providers should support seamless connectivity across on-premises, hybrid and multi-cloud environments through a unified networking framework.

How Tata Communications delivers Network-as-a-Service

Tata Communications delivers network as a service solutions through its IZO™ portfolio, enabling organisations to build secure, scalable, and cloud-ready enterprise networks. The platform combines global connectivity, software-defined networking, and managed services to connect branch offices, cloud platforms, data centres and remote users through a unified network. With centralised management, reliable performance, and flexible service delivery, it helps businesses simplify operations, support hybrid and multi-cloud environments, and accelerate digital transformation with confidence.

Conclusion

As organisations continue to embrace cloud, hybrid working, and digital transformation, network as a service has become a practical way to modernise enterprise networking. By replacing hardware-centric infrastructure with flexible, software-defined services, businesses can improve performance, simplify management and scale their networks more efficiently.

With Tata Communications' IZO™ portfolio, organisations gain access to secure, reliable, and scalable networking capabilities that support cloud-first strategies, distributed workforces, and evolving business needs. The result is a future-ready network designed to keep pace with today's rapidly changing digital landscape.

Discover how Tata Communications' network as a service solutions can simplify connectivity, improve network performance, and support your cloud transformation journey with secure, scalable networking services. Schedule A Conversation