We are all living in the world of digital era. There are numerous technologies is arising to help the stakeholders to promote its status whether it is intended to business purpose or personal benefits. In this competent world of technologies, Cloud Computing is an emerging field. Cloud Computing means renting the services from third party servers. Various benefits such as Infrastructure- as- a- Service (IaaS), Software- as- a- Service (SaaS), Platform- as- a- Service (PaaS) are making Cloud Computing more rich. In this Book, Complete Understanding of Cloud Computing and its functionality is effectively depicted which helps students, scholars and other stakeholders to better understand the concept of Cloud Computing. As we know that failure is a norm rather than exception. So in Cloud Computing, various failures are communication failure, Server Failure, etc. Author in this book proposed an algorithm to deal with Communication link failure in cloud computing era. In light to this, Ant Colony Optimization, a bioinformatic concept, is implemented to provide shortest and fastest link when communication link failure occur in Cloud Computing Platform.