Installing CRM 2013 On Multiple Server (NLB)

Hi, i wanna install Dynamics CRM 2013 on Network Load Balancing (NLB) for the first time. My scenario is, there is 5 servers FARM topology. And we want to install 2 front end server. On the internet, i found this article

https://blogs.msdn.microsoft.com/niran_belliappa/2014/02/17/network-load-balancing-microsoft-dynamics-crm-2013/

After reading the article, i have one short question. Do i need to have at least 1 server that runs full server role ?