Even if you configure security group rules in Huawei Cloud, it will not affect the communication between two elastic cloud servers in the same security group.

Question

Options

• ATrue
• BFalse

• A
  25% (5)
• B
  75% (15)

Explanation

Option B (False) is correct because security group rules in Huawei Cloud do affect communication between Elastic Cloud Servers (ECS) within the same security group. By default, Huawei Cloud security groups include inbound rules that permit traffic between instances sharing the same group, which is why communication typically works - but that behavior is rule-driven, not automatic. If you modify or remove those default inbound rules, communication between instances in the same security group can be blocked.

Option A (True) is wrong because it treats same-group membership as a permanent, unconditional communication guarantee, ignoring that the underlying rules are what actually control the traffic flow.

Memory tip: Same security group does not mean "no rules apply." Think of the security group as a rulebook that every member must follow - members talk to each other only because a rule says they can, and changing that rule changes the outcome.

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