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Two virtual machines run on the same host and are in the same network segment, but they cannot communicate with each other. Which of the following is not a possible cause?
Comprehensive and Detailed Explanation (HCIA--Cloud Computing aligned):
In FusionCompute virtual networking, VMs in the same network segment and same port group should be able to communicate normally.
Option A is a possible cause. Host-based or VM-based firewalls may block traffic between virtual machines.
Option C is also a possible cause. Security groups can apply access control rules that isolate VMs, even within the same subnet.
Option D is a possible cause. Faulty virtual NICs or driver issues can prevent network communication.
Option B is not a possible cause. If both VM NICs are connected to the same port group, they should be able to communicate, assuming no other restrictions exist.
Therefore, the correct answer is B.
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