What is the designation for the server used to support SharePoint?

The correct designation for the server used to support SharePoint is the WEB server. In a typical SharePoint environment, the WEB server hosts the SharePoint web applications and facilitates user access to the SharePoint sites and services. This server is a crucial component for the functionality of SharePoint, as it handles all client requests, manages authentication, and serves content to users' browsers.

The other designations, while they may refer to other types of servers within a network or a specific organization's infrastructure, do not specifically point to a server dedicated to hosting SharePoint applications. The IAEXET, PROV01, and DC02 typically refer to either infrastructure components or other specific roles that do not directly indicate the web application hosting functionality that the WEB designation clearly represents.