High availability concepts
High availability (HA) is simply the ability of a system or a network to continuously operate without failure. For instance, network professionals implement various techniques and technologies into their network infrastructure to ensure it can continue operating without failing over a very long time. For instance, imagine if a switch or a router were to fail within a company; what will be the impact and how many users will be affected? What if the router was connecting the organization’s internal network to the internet service provider (ISP) network? All the users within the organization will be affected and if the company was depending on resources or services that are hosted on a cloud provider’s data center, those cloud resources will be inaccessible.
A common strategy for setting up HA within an organization is to implement fault tolerance in the form of redundancy in hardware components on devices and network infrastructure. For instance...
