On your EX Series switch you must configure a delay buffer for the best effort queue scheduler
named BE-sch which restricts the buffer usage to only 25 percent of the available buffer size.
Which configuration statement will accomplish this task?
A.
[edit class-of-service schedulers BE-sch]
user@switch# set buffer-size buffer-size temporal 25
B.
[edit class-of-service schedulers BE-sch]
user@switch# set buffer-size buffer-size temporal 25 exact
C.
[edit class-of-service schedulers BE-sch]
user@switch# set buffer-size percent 25
D.
[edit class-of-service schedulers BE-sch]
user@switch# set buffer-size exact percent 25
http://www.juniper.net/documentation/en_US/junos11.4/topics/reference/configuration-statement/buffer-size-cos-ex-series.html