The cloud is interlinked in such a manner that there is no clearly defined edge to it. The traditional approach to edge security doesnt work in the cloud environment. Security solutions that can carry out deeper inspections are vital to differentiate between a legal workload and a malicious one. Large-bandwidth, deep packet inspection capabilities are required to efficiently handle traffic through the entry points. This is done to avoid false positives and to stop mutated and zero-day exploits since the network is directly exposed to the global threat landscape.”]
Source: https://securityintelligence.com/cloud-security-protecting-your-enterprise-at-the-edge/