Exam AWS Certified SysOps Administrator - Associate topic 1 question 394 discussion

I would also say C because 1. the ISP is a problem so a private wired connection would solve this and 2. the question mentions "most cost-effective" => 1 DC connection is cheaper than 3. You can replicate the buckets cross region within the aws network or w/e, there are solutions

why is no one talking about option C. To me that is the correct option. With public virtual interface, you will still pay for data transfer charges and it is not even as fast as private virtual interface. Also while creating multiple direct link would be faster, it is not the most cost effective option. I will choose option CCCCCC

Selected Answer: D

AWS Direct Connect with a public virtual interface allows access to public AWS services like Amazon S3 across all AWS Regions over a dedicated private connection. With a single Direct Connect link and a public virtual interface, the data center can access S3 buckets across all Regions without needing separate links to each Region. This approach avoids ISP congestion and provides consistent transfer performance at a lower cost compared to multiple Direct Connect links.

By establishing a single Direct Connect link and creating a public virtual interface, the company can directly connect to public AWS services like Amazon S3 across all regions without incurring the costs of inter-region data transfer over the AWS network. This could result in consistent and possibly enhanced transfer speeds compared to using the public internet without the additional cost and complexity.Establishing a Direct Connect link to just one AWS Region and creating a PRIVATE virtual interface allows the company to use AWS’s internal network for data transfer to the data center. HOWEVER, for accessing S3 buckets in multiple regions securely and privately, traffic would need to be routed over inter-region VPC peering or transit gateways, which may incur additional costs and complexity.

Explanation: Direct Connect provides a dedicated network connection between your data center and AWS, which helps bypass the public internet and reduces issues caused by ISP congestion. A public virtual interface over Direct Connect allows you to access public AWS resources like Amazon S3 without routing traffic over the public internet, improving performance and consistency. Establishing a Direct Connect link to only one Region is more cost-effective compared to setting up Direct Connect links to all three Regions, and you can still access S3 buckets in other Regions over the AWS backbone, ensuring consistent performance.

Answer is D. We use Private Gateway with respect to VPC.

One region is more cost-effective. Private VIF is used to integrate resources within VPC, but S3 is a global service and does not reside in VPC.

Publiv vif for sure

Public Virtual Interface: By creating a public virtual interface, you can access public AWS services, such as Amazon S3, over the Direct Connect link. This setup allows you to transfer data from S3 buckets in any region to your data center using the consistent, dedicated bandwidth of Direct Connect.

C should be it

Correct is D Q: What is a virtual interface (VIF)? A virtual interface (VIF) is necessary to access AWS services, and is either public or private. A public virtual interface enables access to public services, such as Amazon S3. A private virtual interface enables access to your VPC. For more information, see AWS Direct Connect virtual interfaces. https://aws.amazon.com/directconnect/faqs/

First lets make some things clear: 1. Private VIF provides connection to VPC in just 1 specific region. so: Since we can reach 1 bucket in region, what is going to happen to other region buckets? Eventually even if we manage to set up connections via that one VPC with other regions it would incur inter-region data transfer charges! 2.Public VIF allows you to access all AWS public services - means S3 regardless of S3 bucket's region. Transfer cost is the same for all regions. We are not charged data transfer rates for transferring data out of S3 to our Direct Connect location. I hope this makes it clear that we will be using 1 DX connection and public VIF(virtual interface) to access those 3 different region buckets bypassing internet.

should be C

To setup a Direct Connect to one or more VPC in many different regions (same account), you must use a Direct Connect Gateway 1) create one AWS Direct Connect in one region 2) create one Direct Connect Gateway 3) create Private virtual interface to VPCs in regions

See response below

Each region needs a Direct Connect established. Once established, you will setup a private virtual interface to your VPC, but outside of your VPC is where you need a public virtual interface to communicate with services such as S3, Amazon Glacier, etc. This is diagramed out in Stephane Marek's course.