Your network contains an Active Directory domain named contoso.com. The network contains 15,000
client computers. You plan to deploy an Active Directory Certificate Services (AD CS) infrastructure and
issue certificates to all of the network devices.You need to recommend a solution to minimize the amount of network utilization caused by certificate
revocation list (CRL) checking.
What should you include in the recommendation? More than one answer choice may achieve the goal.
Select the BEST answer.

A.
The Network Device Enrollment Service role service

B.
An increase of the CRL validity period

C.
A reduction of the CRL validity period

D.
The Online Responder role service

Explanation:

http://technet.microsoft.com/en-us/library/cc753468.aspx