I have a question.

Whats a telephone exchange

I suppose broadband that uses fibre optic dont have exchanges or do they?

What are the so called exchanges for?

If the exchanges are congested why do we have slow net?

Is it too much data flowing into the exchange that causes slowness and congestion?

Once our lines are connected to the exchange where does it go?Auckland ??then connect to the fibre optic that loops around the world??

Can anyone help me?Because I am a little bit clueness just have a basic knowledge