This book constitutes the refereed post-proceedings of the 4th International Conference on
Networked Systems NETYS 2016 held in Marrakech Morocco in May 2016. The 22 full papers and
11 short papers presented together with 19 poster abstracts were carefully reviewed and
selected from 121 submissions.They report on best practices and novel algorithms results and
techniques on networked systems and cover topics such as multi-core architectures concurrent
and distributed algorithms parallel concurrent distributed programming distributed databases
cloud systems networks security and formal verification.