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 share the same configurations and service client connections evenly.
Two database servers must share data and configurations, with only one being used at a time.
Given the above, which of the following should the administrator propose to BEST meet these requirements? (Select TWO).
A. The web server should be configured with a round-robin DNS with a CNAME record.
B. The web server should be configured with a load balancer with a virtual IP address.
C. The database server should be configured as an active-active cluster.
D. The database server should be configured as an active-passive cluster.
E. The availability aspect of the request does not currently exist in the IaaS cloud platform.
F. The redundancy aspect of the request does not currently exist in the IaaS cloud platform.
This cannot be right. based on how round-robin DNS operates (even with a CNAME record), the IP address returned in response to queries will operate in a round-robin fashion (in this case, Server A, then Server-B, then repeat). The DNS server will have no idea that the servers are configured as an active-passive cluster, so every other query will be provided the IP address of the passive server. A load-balancer, on the other hand, can be made aware (through polling) which of these servers is active and will send traffic only to that server.
Yes. Answer: B, D