Two cloud consumers; Cloud ConA and Cloud ConB, are sharing network resources (e.g., switches, firewall, load balancer, etc.). Some of their provisioned VMs (database servers) are even running on a same physical server. It turns out that Cloud ConB unintentionally sees Cloud ConAs directories, files and datasets, and also receives broadcast packets sent by Cloud ConA.

1. What could be root causes of this problem?
2. As a cloud administrator, propose a solution to this issue.