You can read all of it or none of it, your choice. However, if you are looking to gain the fullest benefit from the Cisco Academy programme - please take the time to consider all of the content. 

We link to external microsites and are happy for you share the links for these with anyone you work with. In fact, feel free to share the link we offered to this course as well. To offer for free, at scale - there are limitations regarding the level of support we can offer and you should expect. If you are an organisation that feel that you require detailed support - we do have consultant support advisors you can pay or go to other Cisco ASC's if you wish.