Security professionals need to be alert to this risk because it can directly inform the strategies they employ to field their cloud applications. Segmentation attacks can and do happen in the cloud, and building in segmentation defense can be critical to the security of your cloud environment. Security professionals must determine whether specifically targeting technical strategies to bolster segmentation adds value or constitutes an unnecessary time sink. There are a few reasons why these techniques are valuable when they are built in from the outset, they provide added peace of mind.”]
Source: https://securityintelligence.com/architecting-segmentation-defense-in-the-cloud/