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Exam AWS-SysOps topic 1 question 511 discussion

Exam question from Amazon's AWS-SysOps
Question #: 511
Topic #: 1
[All AWS-SysOps Questions]

Can you change the security groups associated with the primary network interface (eth0) of an EC2 instance running inside a VPC?

  • A. Yes
  • B. Only if the instance is stopped
  • C. Only when the instance is launched
  • D. No
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Suggested Answer: A 🗳️
After you launch an instance in a VPC, you can change its security groups. Security groups are asso-ciated with network interfaces. Changing an instance's security groups changes the security groups associated with the primary network interface (eth0) Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html#vpc-security-groups

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albert_kuo
10 months ago
Selected Answer: A
You can add or remove security groups from the instance's network interface to modify its inbound and outbound traffic rules. This flexibility allows you to adjust the security settings of your EC2 instances as needed without requiring them to be stopped or relaunched.
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Jichu
2 years, 6 months ago
A is the answer. After you launch an instance in a VPC, you can change its security groups. Security groups are asso-ciated with network interfaces. Changing an instance's security groups changes the security groups associated with the primary network interface (eth0) Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html#vpc-security-groups
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