AWS Certified Advanced Networking Specialty Practice Exam 2025 – The Complete All-in-One Resource for Exam Success

The issue least likely to cause problems when trying to download objects from a public Amazon S3 bucket from instances in the VPC is the availability of free IP addresses in the subnet. Here's why this is the case:

When you create a public S3 bucket, the intention is for it to be accessible over the internet. Instances in your VPC can access the internet through an internet gateway, given that the instances are appropriately configured. If the subnet has insufficient IP addresses, it may impact the ability to launch new instances or connect additional devices, but existing instances with assigned IP addresses can still communicate over the internet as long as the other configurations are correct.

In contrast, issues related to bucket policy configuration, VPC security group restrictions, and lack of internet connectivity directly affect the resources' ability to access the S3 bucket. Therefore, these factors are more likely to cause download issues than the availability of IP addresses in the subnet.