Brief discussion: What is cloud network?

The future of cloud is bright. By 2024, more than 45% of IT spending will be retiring legacy networks and replacing them with cloud. What’s driving these trends? In a nutshell: modern cloud networking.

What is Cloud Networking?

Cloud networking uses the cloud (a centralized third-party resource provider) to enable connectivity between network resources. Cloud networking acts as a gatekeeper for applications.

Mastering this concept means being able to leverage the cloud for infrastructure, network management, network monitoring, and maintenance. In other words, network resources can be designed, configured, managed, and fine-tuned in the cloud to create simple and resilient networks. These cloud-based network resources can include:

• Virtual Router
• Virtual Private Network (VPN)
• Virtual Firewall
• Data connectivity
• Load Balancer
• Virtual Bridge
• Virtual Adapters, etc.

With cloud networking, the network can be cloud-enabled or completely cloud-based.

In a cloud-enabled network, the network is on-premises, but some or all of the resources used to manage it are in the cloud. The core network infrastructure (packet forwarding, routing, and data) remains on-premises, but things like network management, monitoring, maintenance, and security services are done through the cloud. For example, a SaaS-based firewall is used to protect the local network.

In cloud-based networking, the entire network is in the cloud. This includes network management resources and physical hardware. Cloud-based networking is used to provide connectivity between applications and resources deployed in the cloud.

History of the Cloud

Most of the developments in the field of cloud computing and cloud networking can be traced back many years.

As early as the 1960s, the convergence of the concepts of providing services, virtualizing them, and enabling network access to those services shaped the definition and purpose of the cloud.

These concepts not only pioneered the idea of ​​working in the cloud, but also provided a springboard for IT departments to move beyond traditional network architectures and completely change the way they approach software and hardware procurement.

From 2005 to 2011, the use of public and private clouds began to gain traction and the first generation of clouds emerged.

A major driver behind the widespread use of public clouds is the launch of Amazon's Elastic Compute Cloud (E2C), a web-based service that allows users to rent virtual servers to run applications on Amazon Web Services (AWS) infrastructure. This has dramatically changed the way IT departments work.

Companies also no longer need to invest in expensive on-site servers and can optimize network resources for strategic business continuity.

By 2012 to 2017, the second generation of cloud laid the foundation with the emergence of pay-as-you-go computing infrastructure and services, DevOps, real-time streaming services, and hybrid cloud. The computing environment provides more choices, allowing data and applications to move easily between public, private, hybrid, and multi-clouds.

Cloud Network and Traditional Network

As cloud networks continue to evolve, more and more network architects are faced with a recurring question: Should I bring my company’s computing to the cloud? Or should I continue to use traditional networks? There is no perfect answer to this question, and it depends on what the user considers to be added value.

First, traditional IT models are among the most secure network models. They allow data owners to maintain tight control over their information and how it is shared without relying on cloud servers. But this comes at a cost: different hardware needs to be purchased and regularly upgraded. Likewise, user experience is often compromised by traditional models. Users expect to be able to access data and resources no matter where and when they are.

Cloud networking, on the other hand, involves far less user-owned hardware and software. Instead, network hardware and software resources are hosted in the cloud, allowing access to real-time capabilities on an on-demand, pay-as-you-go basis. This reduces the potential for redundant resources and provides network architects with a better advantage in tailoring specific requirements as different situations arise.

Cloud Network and Cloud Computing

Most definitions of cloud networking that we have used so far are based on the location of the network infrastructure that powers the connections between resources. This is different from cloud computing, which is much broader than cloud networking and encompasses all the computing services needed to make applications run in a service provider's data center (rather than a traditional data center).

While the concepts of cloud networking and cloud computing are often used interchangeably, there are some differences to be aware of.

Cloud networking is concerned with network resources and how they are managed, connected, and controlled in the cloud.

Cloud computing focuses on applications and services hosted in the cloud. These services can include storage, software, and databases.

Advantages of Cloud Networking

As cloud networking evolves, some of the benefits include:

• Reduced costs: Companies can save on capital costs by not having to purchase and maintain expensive servers and hardware resources.
• Minimal downtime: The cloud provider handles all updates related to the cloud resources it provides. This means there is one less operational issue for the network team to consider. In most cases, if there is downtime, it will be notified in advance to allow time to implement alternative solutions.
• Scalability: With cloud networking, IT teams can assess business needs and modify capacity as needed. In the cloud, this is usually a seamless process, but in the case of traditional networks it often results in disruptions.
• Productivity: With the service provider responsible for the maintenance, automatic updates, and testing of the cloud network, users spend significantly less time on management tasks.
• Resilience: When planning for the future of your computer network, uptime and consistent performance must be considered.

Traditional networks are not easily recoverable from failures. For example, a server failure can mean long-term outages or even data loss. These costs add up, with the average infrastructure failure costing $100,000 per hour, while application failures cost between $500,000 and $1 million per hour, depending on the size of the enterprise and the network model.