Network Security Resiliency - A reliable synchrophasor network of phasor measurement units (PMUs) is essential for modern power system operations and management with rapidly increasing levels of renewable energy sources. Cyber-physical system vulnerabilities such as side-channel based denial of service (DoS) attacks can compromise PMU communications even when using an encrypted virtual private network. To overcome these vulnerabilities, countermeasures to DoS attacks needs to be developed. One such countermeasure is the development and deployment of a virtual synchrophasor network (VSN) to improve the reliability of a synchrophasor network to DoS attacks. A cellular computational networks (CCN) is a distributed artificial intelligence framework suitable for complex system modeling and estimation. CCNs have been proved to mitigate the effects of DoS attacks on single PMUs successfully. In this study, the robustness of a VSN is further investigated and proven to exhibit resiliency under concurrent DoS attacks. Typical results for VSN applications in multi-area power systems with utility-scale photovoltaic solar plants are presented.