Which of the following statements BEST describes an appliance server?

Which of the following statements BEST describes an appliance server?

A.
Appliance servers are the most common server products in use and provide multiple services.

B.
Appliance servers are configured to run programs that can be accessed by multiple users.

C.
Appliance servers provide either a single service, or related services.

D.
Appliance servers combine related server types into clusters.

Explanation:
Appliance servers provide either a single service, or related services, such as Internet caching and firewall protection.
Incorrect Answers:
A: General purpose servers are the most common server products in use and provide multiple services, such email, file, print, and web services that run on an industry-standard network operating system (NOS).
B: Application servers are configured to run programs that can be accessed by multiple

users.
D: A multi-tiered server structure combines related server types into clusters and can be subdivided into front-end, mid-tier, and back-end servers.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 8-29.