Which maintenance task is the customer’s responsibility, according to the AWS shared responsibility model?

Explanations:

Physical connectivity among Availability Zones is managed by AWS, ensuring redundancy and availability.

Network switch maintenance is also the responsibility of AWS as part of their infrastructure management.

Hardware updates and firmware patches are handled by AWS, as they manage the physical infrastructure.

Amazon EC2 updates and security patches are the customer’s responsibility, as they manage their instances and applications.