Which of the following is a characteristic of the out-of-band telecom networks?

A.
ESCON switches can be used on features such as routing, or Quality of Service (QoS).

B.
ESCON switches manage and report on where data lies on the storage devices.

C.
Out-of-band telecom ESCON switch model is not present in modern storage networking environments.

D.
None of the above

Explanation:
ESCON switches designed for use in out-of-band telecom networks possess the following characteristic, that they manage and report on where data lies on the storage devices.
Incorrect
Answers:
A: ESCON switches lack the advanced intelligence required for features such as routing, or Quality of Service (QoS).
C: The out-of-band telecom ESCON switch model is found in a significant segment of modern storage networking environments.

References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 283-290.