Virtual networks can be thought of as separate networks within a larger network. Administrators can create a separate network segment consisting of a range of subnets (or a single subnet) and control traffic that flows through the cloud network. Depending on your business needs, you can implement your network using cloud technology from a cloud service provider (CSP).
The key difference for cloud administrators and architects when it comes to designing cloud networking solutions is the amount of control needed to have over the hardware. When you implement cloud networking with a CSP, you have little control over — and likely little knowledge about — the design of the CSP’s network. Because of this limitation, virtual networks are often the go-to choice when you want to provide secure network isolation.
- Isolation
You can keep networks isolated from one another to ensure security and for purposes of development, quality assurance and deployment of cloud networks. - Internet Connectivity
Each virtual network can be configured to access or deny access to the internet, or to limit access to specific destinations on the internet if needed. - Connection to Other Cloud Services
Virtual networks often need a connection to CSP services. This allows the network to utilize services offered by the CSP. Providers typically allow for configuration of routing tables, domain name resolution, firewall and related items to manage the connections to your virtual networks.
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