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Alibaba Cloud Elastic Compute Service (ECS) instances in different Security Groups will definitely have no way to communicate with each other.
Suggested Answer: A
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16 comments · newest first
VI
Vi
12 months ago
Huh, I didn't know that! Sounds a bit limiting.
AD
Adolph
12 months ago
Definitely false, you can configure security rules for that.
RA
Raymon
12 months ago
Wait, really? I thought they could use VPC peering.
KR
Krissy
1 year ago
I disagree, there's always a way to set up communication.
LI
Lindy
1 year ago
That's true, they can't communicate directly.
EL
Elfriede
1 year ago
I recall reading that by default, instances in different Security Groups can't talk to each other, but I’m not entirely confident about that.
LE
Leslee
1 year ago
I’m a bit confused because I thought Security Groups were meant to isolate traffic, but maybe they can still communicate under certain conditions?
IS
Isadora
1 year ago
I practiced a similar question where instances in different Security Groups could communicate if the right permissions were in place. This makes me lean towards False.
JO
Jose
1 year ago
I think I remember something about Security Groups allowing communication if rules are set up correctly, so I'm not sure this statement is true.
AL
Alyce
1 year ago
This one is tricky! I recall studying that Security Groups are quite flexible, but I can't remember if they completely block communication by default.
TI
Tina
1 year ago
I might be mixing this up, but I thought Security Groups could be configured to allow traffic between instances. So, maybe it's False?
AN
Annabelle
1 year ago
I'm not entirely sure, but I feel like there were practice questions that mentioned inter-group communication under certain conditions.
MA
Malcolm
1 year ago
I think I remember something about Security Groups allowing communication if rules are set up correctly, so I'm leaning towards False.
KE
Kerrie
1 year ago
I think this question is asking about the best use case for sequence data flow, so I'll need to consider the different options and how they relate to that concept.
GA
Galen
1 year ago
Wait, I'm not sure I fully grasp the difference between mapping and classification. I better re-read the material.
AH
Ahimed Habib Husen
4 years ago
B
ECS instances in different VPCs cannot communicate with each other. To achieve communication between two ECS instances in different VPCs, use Express Connect, VPN Gateway, or CEN to connect them. When doing so, make sure the security group rules allow access between the target ECS instances.
https://www.alibabacloud.com/blog/ecs-security-groups-configuring-guide_595115