What is a "technology stack" for a system administrator?

Question

System administration

Recently, I often come across the words: "What stack of technologies do you own"? And I find it difficult to answer this question. Can someone explain the meaning of these words in a simple way?

Answer 1

Virtualization tools, servers (web, dns, Active directory, etc.), routers, firewalls, monitoring tools, operating systems - etc. - that's all ...
Just list what you have experience with.

Answer 2

As my teacher said: If you do not understand the meaning of this word, this is probably not the job for you. "
Learn to google comrade.