Exam AWS-SysOps topic 1 question 755 discussion

Exam question from Amazon's AWS-SysOps

Question #: 755
Topic #: 1

A SysOps Administrator is responsible for maintaining an Amazon EC2 instance that acts as a bastion host. The Administrator can successfully connect to the instance using SSH, but attempts to ping the instance result in a timeout.
What is one reason for the issue?

A. The instance does not have an Elastic IP address
B. The instance has a security group that does not allow Internet Control Message Protocol (ICMP) traffic
C. The instance is not set up in a VPC using AWS Direct Connect
D. The instance is running in a peered VPC

Show Suggested Answer

Suggested Answer: D 🗳️

by nicat at May 8, 2020, 2:49 a.m.

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nicat

Highly Voted 2 years, 10 months ago

B. The instance has a security group that does not allow Internet Control Message Protocol (ICMP) traffic

upvoted 19 times

AWSvad

2 years, 10 months ago

Thanks for your feedback on the new questions. Please keep it coming.

upvoted 1 times

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albert_kuo

Most Recent 1 year, 1 month ago

Selected Answer: B

By default, Amazon EC2 instances have security groups that allow SSH (port 22) incoming traffic but do not allow ICMP traffic, which is used for pinging. If the security group associated with the instance is not configured to allow ICMP traffic, attempts to ping the instance will result in a timeout.

upvoted 1 times

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