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Cloud networking vs. cloud computing: What’s the difference?

Cloud computing and cloud networking are related but distinct ideas. While cloud computing concerns how applications run, cloud networking covers how connectivity to and among applications is managed and delivered.

Cloud computing
Cloud computing shifts enterprise workload hosting from traditional in-house or colocated data centers to a cloud service provider’s (CSP’s) data center. The enterprise customer has no access to or direct control of the computing infrastructure underlying the services the workload runs on.
Cloud computing is delivered via different consumption models. There are three basic models for consuming cloud services, and each one provides customers with a different level of visibility into and control of their workloads. The models are as follows:

IaaS delivers a hypervisor layer on which customers provision VMs. Customers can also monitor their workloads from the OS level up.
PaaS delivers access to a middleware environment, such as a database or a Java application server, in which customers can deploy applications. Customers can monitor the behavior of their workloads within the middleware environment but can’t see anything beneath or outside that environment.
SaaS delivers access to a running application, and customers can only monitor their own user, data and configuration information within that application space. Customers can’t see the cloud environment within which that application runs.

Cloud computing benefits and challenges
Among the benefits of cloud computing are the following:

Organizations can save money because they don’t have to purchase and maintain technological infrastructure.
Data stored in the cloud can be accessed by users from anywhere — and at any time — using an internet connection.
Organizations can recover their data quickly in an emergency.

However, cloud computing has the following challenges:

Organizations can experience authentication issues and concerns as to how sensitive information is handled by the cloud provider.
It can be difficult to find employees with the required skills needed to manage data in the cloud.
Migrating and accessing data might be an issue if an organization decides to switch providers.

Cloud networking
Cloud networking involves shifting network management, control and even data connectivity to an external cloud infrastructure. That is, cloud networking uses cloud services to control network traffic and to connect network resources.

Cloud networking examples include the following:

Using cloud-based network controllers to manage wireless LANs (WLANs) across a company.
Using cloud-based network controllers to direct WANs in a software-defined WAN.
Using a CSP’s internal WAN to help carry enterprise WAN traffic among locations.

When compared to a traditional network, cloud networking can replace the control plane for most parts of a network architecture without hurting network performance.

Cloud networking benefits and challenges
Some of the benefits of cloud networking include the following:

Cloud networking is based on a pay-per-use model, so organizations don’t have to buy their own network equipment and software.
The CSP handles system updates, which lets an organization’s staff work on higher-priority tasks.
It’s easy to scale operations in the cloud.

However, the following challenges can occur:

Organizations can be locked into one cloud provider.
If a connectivity or uptime issue occurs, organizations have to wait for the provider to fix it.

Cloud computing and cloud networking: Separate but related
There’s a natural overlap between cloud computing and cloud networking: Anyone using a cloud platform via IaaS uses cloud networking to connect VMs in that environment to each other, other cloud services and the larger internet. And in a hybrid cloud, enterprises use cloud networking to interconnect cloud resources with internal systems in data centers.
Beyond that, in a modern hybrid network it’s typical to shift into the cloud some functions that would be delivered by network appliances in a legacy network. A company might run a global load balancer on a virtual appliance in an IaaS environment, for example, consume a WLAN management platform or secure a web gateway as a service, SaaS-style.

Ubiquitous?
Nearly all organizations use cloud computing. A smaller number use cloud networking, but several trends are increasing that percentage rapidly, including the following:

Editor’s note: This item was updated in May 2024 to provide additional information on the benefits and challenges of cloud computing and cloud networking and to provide a better reader experience.
John Burke is CTO and principal research analyst with Nemertes Research. With nearly two decades of technology experience, he has worked at all levels of IT, including end-user support specialist, programmer, system administrator, database specialist, network administrator, network architect and systems architect. His focus areas include AI, cloud, networking, infrastructure, automation and cybersecurity.

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