Which of the following ports is NOT used by Dynatrace Managed cluster nodes?

Dynatrace Managed cluster nodes utilize specific ports for communication and operational purposes. The port number 80 is typically associated with standard HTTP traffic; however, in the context of Dynatrace Managed, it is not utilized for internal cluster communications or node interactions.

The other ports serve definitive roles within the Dynatrace architecture. Port 8443 is employed for secure communications (HTTPS) between various components in the cluster. Port 9200 is used for Elasticsearch, which is a critical part of data storage and retrieval in the Dynatrace ecosystem. Lastly, port 5701 is utilized for Hazelcast, which is employed for clustering and distributed computing functionalities among the nodes.

Understanding these roles clarifies why 80 is the correct answer—it lacks a specific function in the Dynatrace Managed cluster's communication framework, distinguishing it from the essential ports used for operations.