The relationship is many-to-many. A single application server can host multiple applications (a one-to-many relationship from server to application). Conversely, a single application can be deployed across multiple application servers for reasons like load balancing, high availability, or scaling (a one-to-many relationship from application to server). When both conditions are true, the overall relationship between the two classes is defined as many-to-many. This is typically implemented in the CMDB using a separate relationship table (cmdbrelci) to link the records.

B. Many-to-one would imply many application servers host only one application, which contradicts the scenario.

C. One-to-one would mean each application server hosts exactly one application, and each application runs on only one server.

D. One-to-many would imply an application server can host many applications, but an application can only run on a single server.

- ServiceNow Product Documentation. (2023). Create a many-to-many relationship. "A many-to-many relationship is one in which many records in one table can relate to many records in another table."

- ServiceNow Product Documentation. (2023). Common Service Data Model (CSDM) product view. The CSDM framework illustrates how applications (Application Service CIs) are realized by infrastructure CIs

often showing a distributed architecture where one service relies on many servers.