These materials are mainly based around the Network Engineer job role. Personally I am looking to become a Network Engineer and then progress into a Cloud Engineer.
There are a few courses available at the moment that are on offer if you wish to pursue a career in Networking.
These 3 courses have been created by David Bombal and reviews are great for what they have allowed others to achieve. They are €9.99 each down from €19.99 each, this offer has 4 days remaining.
I would also recommend using Codecademy to study Python as the language is becoming very big within the industry, especially within the Cloud.
These courses are the ones I am using to help me study and they're 100% worth the money.