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Tiers are physical or not?

In the description it is stated that tiers are a physical separation of components while in the quiz it is stated that tiers are a logical separation. Which is true?

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Hi,

In the introduction, it’s mentioned that tier is a logical separation of components in an application or a service. When I say separation, I mean physical separation at the component level, not the code level. So, in other words, tier is a logical and physical separation of components.

Hope that clears your confusion!

@Andrea_Carboni A tier is both the logical and physical separation of components in an application or a service. The lesson and the quiz have been updated.