What does Plesk update?

[Kroptokin]

I've never understood this.

When Plesk updates itself what, exactly does it update, apart from its own files?

Does it for example update Apache or PHP or system libraries or even the whole system?

Or not?

With thanks

--Justin Wyllie

 

[IgorG]

Actually updating Apache, PHP, system libraries is OS task, but not Plesk. Plesk doesn't ship these components but only downloads them from original OS vendor repo.
But there may be some nuances for different OSes, components versions, etc.