What type of scaling involves adding capacity by deploying additional servers?

The type of scaling that involves adding capacity by deploying additional servers is known as horizontal scaling. In horizontal scaling, organizations enhance their application's capacity and performance by distributing the load across multiple servers or instances. This approach allows for improved availability and redundancy, as additional servers can be brought online to handle increased demand without requiring significant changes to the existing infrastructure.

Horizontal scaling is particularly beneficial in cloud environments where resources can be provisioned or de-provisioned rapidly based on workload needs. This flexibility enables organizations to respond efficiently to varying traffic patterns or sudden spikes in demand.

Vertical scaling, on the other hand, involves enhancing the capacity of a single server by adding more resources like CPU, RAM, or storage, rather than distributing the workload across multiple servers. Dynamic and static scaling refer to automatic and manual adjustments in resource allocation, respectively, but do not specifically pertain to the act of deploying additional servers.