What characterizes a tag in network policies?

A tag in network policies is effectively a label that can denote a collection of resources, including multiple IP addresses and domains. This collective approach allows for easier management and organization within network policies, as administrators can group related addresses and domains under a single tag.

Using tags to represent a collection simplifies the process of applying policies, as network managers can control access or enforce rules for all resources associated with that tag without having to specify each individual IP address or domain explicitly. This hierarchical organization leads to enhanced efficiency in policy management and simplifies the application of security configurations or rules across the network.

In contrast to the other choices, a single IP address or a group of computers does not provide the flexibility and scope that tags are designed to offer in network policies. Tags facilitate broader and more effective policy enforcement by encompassing multiple entities.