A cloud administrator is tasked with ensuring redundancy and high availability of an IaaS cloud platform environment. The administrator is given the following requirements: Two web servers must…

Configuring web servers with round-robin DNS with a CNAME record allows for basic distribution of client connections across multiple servers, providing a form of load sharing and redundancy by resolving the same hostname to different IP addresses sequentially.

While a load balancer provides more sophisticated and intelligent traffic distribution, round-robin DNS (A) is also a valid method for sharing client connections among web servers and is chosen as the correct answer in this context.

An active-active cluster means both database servers are simultaneously processing requests, which directly contradicts the requirement that 'only one being used at a time.'

An active-passive cluster configuration for database servers ensures that only one server is actively processing requests at any given time, with the other serving as a standby for failover, precisely meeting the requirement for redundancy where data is shared and only one instance is used.

The availability aspect of the request can be met using common IaaS patterns like load balancing (or DNS round-robin) and clustering, so this statement is incorrect.

The redundancy aspect of the request can be met using common IaaS patterns like multiple web servers and database clustering, so this statement is incorrect.