Goal:
Recommended SharePoint architecture for a corporate organisation with 200 employees.

Problem:
What I have learned, you can use the architecture from the picture below to to make every unit have a own site collection or similiar.

Is there a better solution to do it?

Information:
- Using SharePoint 2013

Its a perfectly acceptable solution, but you need to ask why you may want to split them bu site collection?  200 consumers is not a lot of people - so you'd need a good reason to split by site collections rather than just giving each function (sales, Finance, Marketing) a site in the same site collection - either in the same or unique content databases.

Hi,

Above diagram is related to logical or information architecture. That's seems to be ok. By having each department its own site collection its easy to manage site and its database. We are also following same structure. it also help for future growth. 

What about physical architecture, have to plan for physical architecture.  

thx

What about physical architecture, have to plan for physical architecture.