Exam 5V0-35.21 Topic 1 Question 88 Discussion

The type of node that should be deployed to monitor a remote datacenter using an existing vRealize Operations Manager cluster is a Remote Collector node. A Remote Collector node is a node that is deployed in a remote datacenter location across a firewall, and collects data from the remote objects without performing analysis or storing data. A Remote Collector node can reduce the bandwidth consumption and the load on the vRealize Operations analytics cluster, and can also navigate firewalls and interface with remote data sources12. A Remote Collector node can be deployed on a different operating system than the rest of the cluster, and can support a round-trip time (RTT) of up to 200 ms3.
The other options are not correct, because they are not suitable for monitoring a remote datacenter with a high RTT. A Replica node is a node that is converted from a Data node to provide high availability (HA) or continuous availability (CA) for the vRealize Operations cluster. A Replica node is a copy of the Primary node, and must be deployed in the same datacenter as the Primary node1. A Data node is a node that performs data collection and analysis for the vRealize Operations cluster, and can be added to scale out the cluster capacity and performance. A Data node must be deployed in the same datacenter as the Primary node, and can support a RTT of up to 10 ms1. A Witness node is a node that is required for continuous availability (CA) of the vRealize Operations cluster, and acts as a decision maker in case of a network partition between two fault domains. A Witness node must be deployed in a third datacenter that is separate from the two fault domains, and can support a RTT of up to 100 ms1.
References:
About vRealize Operations Cluster Nodes - VMware Docs
vRealize Operations Manager: Design Introduction - VMware Blogs
Mastering vRealize Operations Manager - Second Edition - Packt Subscription vRealize Operations node types - Mastering vRealize Operations Manager ...