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Exam AWS-SysOps topic 1 question 204 discussion

Exam question from Amazon's AWS-SysOps
Question #: 204
Topic #: 1
[All AWS-SysOps Questions]

George has launched three EC2 instances inside the US-East-1a zone with his AWS account. Ray has launched two EC2 instances in the US-East-1a zone with his AWS account. Which of the below mentioned statements will help George and Ray understand the availability zone (AZ) concept better?

  • A. The instances of George and Ray will be running in the same data center
  • B. All the instances of George and Ray can communicate over a private IP with a minimal cost
  • C. All the instances of George and Ray can communicate over a private IP without any cost
  • D. The US-East-1a region of George and Ray can be different availability zones
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Suggested Answer: D 🗳️
Each AWS region has multiple, isolated locations known as Availability Zones. To ensure that the AWS resources are distributed across the Availability Zones for a region, AWS independently maps the Availability Zones to identifiers for each account. In this case the Availability Zone US-East-1a where George's EC2 instances are running might not be the same location as the US-East-1a zone of Ray's EC2 instances. There is no way for the user to coordinate the Availability
Zones between accounts.

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albert_kuo
8 months, 3 weeks ago
Selected Answer: D
This statement clarifies that while George and Ray are both using the "US-East-1a" identifier, it is important to note that within a region like "us-east-1," availability zones are different and isolated from each other. In this case, even though they are both in "US-East-1a," the availability zones of George and Ray can actually be different physical locations with their own independent infrastructure. This concept emphasizes the importance of using multiple availability zones for higher availability and fault tolerance.
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Sam0_2000
2 years, 6 months ago
I am not sure of D US-East-1 is the region and us-East-1a is the availability zone For George AZ US-East-1a Location 1 AZ US-East-1b Location 2 AZ US-East-1c Location 3 For Ray AZ US-East-1a Location 4 AZ US-East-1b Location 5 AZ US-East-1c Location 6 So The ec2 instances may have different locations but they will be in same AZ us-east-1a. The above makes A and D wrong. B is also wrong We know that the data-transfer within the same region is no-cost so The correct answer would be C
upvoted 1 times
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TroyMcLure
2 years, 6 months ago
Correct Answer: D
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NivNZ
2 years, 6 months ago
the Availability Zone us-east-1a for your AWS account might not be the same location as us-east-1a for another AWS account. To coordinate Availability Zones across accounts, you must use the AZ ID, which is a unique and consistent identifier for an Availability Zone. Above info from AZ section in https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html So answer is D
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angelsrp
2 years, 6 months ago
Ans A: "US-East-1a" is one of the N.Virginia AZs which means is the same data center
upvoted 1 times
ImranR
2 years, 6 months ago
No ...D is correct...Good explanation by Golddust...
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AlbertEd
2 years, 7 months ago
Could be B. Because that is no US-East-1a region
upvoted 1 times
Golddust
2 years, 6 months ago
US-East-1a refers to the account's Availability zone. AWS assign different availability zones per account. Therefore my AZ 1 and your AZ1 in not guaranteed to be the same data center. They mainly do this to spread customers over various data centers. It is human nature than everyone will choose AZ1 and therefore they are not the same.
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awscertified
2 years, 7 months ago
D. The US-East-1a region of George and Ray can be different availability zones
upvoted 3 times
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