I'm assuming that what you are saying is that while the headphone is plugged in to the computer, it still plays on the computer speakers.
Most likely, the headphone outlet is dirty and need cleaning. To solve this, plug in your headphones into the headphone outlet, and take it out really quickly. Do this for a certain amount of time until it works.
If this does not work, check the settings if you are allowing it to play into external devices or not.
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The knowledge serves as good foundation for me to understand how technology works behind the scene as well. So I must say a good understanding of computer architecture gives the data scientist the ability to propose feasible solution in capturing and maintaining data, implementing models and algorithms in IT systems.
On a network, a(n) Switches helps prevents data packets from colliding with each other.
