To answer this question, you need to understand the process of changing servers from Windows NT 3.51 to Windows NT 4.0. Let's go through each option to understand why it is correct or incorrect:
Option A) Patch - This option is incorrect because while updating or patching the existing Windows NT 3.51 server may be necessary for security or bug fixes, it is not the specific requirement for changing servers from Windows NT 3.51 to Windows NT 4.0.
Option B) Upgrade - This option is correct because changing servers from Windows NT 3.51 to Windows NT 4.0 requires upgrading the existing servers. Upgrading involves installing the new version of the operating system while preserving the existing data and configurations.
Option C) DLL Replacement Files - This option is incorrect because changing servers from Windows NT 3.51 to Windows NT 4.0 does not specifically require the replacement of DLL (Dynamic Link Library) files. DLL files are shared libraries used by multiple applications, and while some DLL files may need to be updated during the upgrade process, it is not the primary requirement.
Option D) Clean Install - This option is incorrect because a clean install involves completely removing the existing operating system and installing a fresh copy. Changing servers from Windows NT 3.51 to Windows NT 4.0 does not necessarily require a clean install, as upgrading is the preferred method to preserve existing data and configurations.
Option E) Dual Boot Operating Systems - This option is incorrect because dual booting involves installing multiple operating systems on the same machine and choosing which one to boot into at startup. Changing servers from Windows NT 3.51 to Windows NT 4.0 does not require setting up a dual boot configuration.
The correct answer is B) Upgrade. This option is correct because changing servers from Windows NT 3.51 to Windows NT 4.0 requires upgrading the existing servers to the new version of the operating system while preserving the existing data and configurations.