Final answer:
The correct function of a Read-Only Domain Controller (RODC) from the provided options is to provide a secure mechanism for granting non-administrative users rights. So correct answer is (B).
Step-by-step explanation:
The question regards the capabilities of a Read-Only Domain Controller (RODC) in a network environment. An RODC is a type of domain controller in Microsoft Windows environments that holds a read-only copy of the Active Directory database. It is designed to be deployed in locations where a full domain controller might not be secure or practical.
Let's evaluate the given options:
- A. Using the RODC as a bridgehead server is not one of its functions because bridgehead servers are typically writable domain controllers that replicate data between sites.
- B. Use the RODC to provide a secure mechanism for granting non-administrative users rights is a correct function. RODCs have features like credential caching, where permissions can be granted without providing users administrative right to the entire domain.
- C. RODCs are not used as a source domain for another domain controller because they have a read-only copy of the data.
- D. Although RODCs support read-only Dynamic DNS (DNS updates), they do not support all aspects of DNS dynamism that writable domain controllers do.
Therefore, the available function of an RODC from the options presented is to provide a secure mechanism for granting non-administrative users rights (option B).