Deep learning is a subset of machine learning where computers can learn and make intelligent decisions themselves. They accomplish this by replicating how the neurons in our brain work. Therefore, it is imperative to understand how a neuron works.
One of my other interests besides cyber security is data science, specifically machine learning. Having went through the Stanford University machine learning course by Dr Andrew Ng, I felt that it has provided me with the technical knowledge to go further and look at how machine learning is applied in the real world.