A group of independent servers, which are managed as a single system, that provides higher availability, easier manageability, and greater scalability is:
Correct Answer: A
Explanation/Reference:
Explanation:
A server cluster is a group of servers that are viewed logically as one server to users and can be managed as a single logical system. Clustering provides for availability and scalability. It groups physically different systems and combines them logically, which provides immunity to faults and improves performance.
Incorrect Answers:
B: A cluster contains servers, not clients.
C: A guest cluster is referring to something more specific compared to a server cluster. For example, for Windows Server 2012, a failover cluster that is made up of two or more virtual machines is typically referred to as a guest cluster.
D: A host cluster is a more specific notion compared to server cluster, specifically, it is a type of web hosting.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 1272