Hi @prashant ,
Your mentioned updates are most likely part of a cumulative update, a cumulative update is an update which includes previously released updates, it's like more than one simple update bundled together.
If your Windows Server 2012 R2 computer is up-to-date with the latest patches, then you'll likely have the updates you mention already installed.
Some updates can be downloaded as standalone, you can search for some of them over at the Microsoft Update Catalog.
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Best regards,
Leon