Cloud network architecture overview
1. Cloud network architecture overview
Network architecture refers to the design of a virtual network in Google Cloud. It defines how virtual machines, containers, and other resources connect and communicate with each other within your cloud environment. While Google manages the underlying physical infrastructure, you are responsible for configuring the software, protocols, and Google Cloud managed services that make up your virtual network. This includes components like VPC networks, subnets, firewalls, Cloud Routers, Cloud VPNs, and access points for on-premises connections. The network design impacts the scalability, security, performance, and cost of your network. A well-designed network can support your business growth by providing the scalability, security, performance, and cost-efficiency you need. On the other hand, a poorly designed network can lead to a number of problems, such as outages, security breaches, and slow performance. These problems can disrupt your business operations and damage your reputation. Not all network designs are suitable for all situations. You select network components and protocols based on your organization’s needs and priorities. Tailoring your network architecture to your organization's specific needs is paramount. Start by thoroughly assessing your current and future requirements, considering factors like the number of users, applications, traffic volume, and security considerations. Once you have a clear understanding of your needs, define quantifiable metrics for scalability, security, performance, and cost efficiency. These metrics can serve as a benchmark for evaluating your design choices. Google Cloud offers a comprehensive suite of networking services and tools. Google Cloud offers a comprehensive suite of networking services and tools. Identify the ones that best suit your requirements and leverage them to craft a secure, scalable, and cost-effective network architecture. Google Cloud provides a powerful arsenal of networking services that enable you to build robust and optimized VPC networks. Each service plays a crucial role in achieving essential network characteristics like scalability, security, performance, and cost-efficiency. A VPC network enables secure resource grouping by segmenting your network into distinct subnets based on functionality, security considerations, or project boundaries. You have granular control over access lists and security policies within each VPC network. Cloud VPN establishes secure tunnels for encrypted data communication between your on-premises network and Google Cloud. Cloud Interconnect directly provides high-bandwidth, low-latency connections between your on-premises network and Google Cloud. If needed, you can deploy Cloud VPN over Cloud Interconnect to provide encrypted data communication. Cloud Router dynamically exchanges routes between Virtual Private Cloud Networks and on-premises networks. A Cloud Router also serves as the control plane for Cloud NAT. You have multiple configuration options, including policy-based routing and BGP peering. Cloud Router provides BGP services for the following Google Cloud products: Cloud Interconnect, Cloud VPN, and Router appliance. Load balancers play a vital role in cloud networks by intelligently distributing incoming traffic across multiple backend servers or instances. This optimization prevents overload on individual servers, enhancing performance, scalability, and ensuring high availability for your cloud-based applications. Firewall rules provide granular access control, which is critical in protecting your VPC network. Grouping firewall rules into firewall policies helps you protect your Google Cloud infrastructure more easily. The firewall provides more specific control over traffic entering or leaving individual virtual machine instances. Cloud CDN caches content using Google's global edge network, accelerating web applications. By selecting the most appropriate Network Service Tier, you can optimize network performance and cost based on your specific traffic requirements. Choose Standard Tier for general workloads when speed is not a primary concern. Choose Premium Tier for demanding applications that require higher throughput and lower latency. Let’s take a look at an example: Cymbal Bank acquired a small subsidiary with a banking application on three VMs in one subnet. One VM will host the web server, another VM will host the business logic, and another VM will host the database. This approach was fine but now Cymbal Bank wants to roll out this a banking application to a global audience, with clients in Asia, North America, and Europe. Cymbal Bank wants to avoid bottlenecks. As shown, this network design is better for the following reasons: There are more servers to spread out the processing. Here, we see two sets of VMs that run the web server, the business logic, and the database. While the regions are mirrored, the subnet IP ranges are unique. Probably, you would use more than two sets of VMs, but only two sets are shown here to simplify the example. A load balancer handles routing client requests to the least busy set of VMs. This way, you reduce the likelihood of a bottleneck. Each VM is in a separate subnet. This approach allows you to apply different security, such as firewall rules and IAM permissions, to each subnet. Therefore, to each VM. For example, using this approach, you can lock down the database to only accept messages from the business logic VM. Depending on the application, and on the clients that use it, there may be other design changes that would be appropriate. For now, it’s important to note that a good network design can help make an application run faster and more securely. In this course, you will learn some common network design approaches.2. 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