NetBios is not available in Windows Vista, Server 2008, and later versions of Windows. However, NetBios should be understood by a security professional because it is used for .

Backward compatibility

Explanation:

Based on the information provided within the question it can be said that security professional need to understand it because it is used for Backward compatibility. This means that it is used for interoperability with older systems that may otherwise no longer be used or may need other software. That is because the Network Basic Input/Output System (NetBIOS) provides various services to the session layer of the OS.

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