642-437 Latest Exam Braindumps
Question 10: Refer to the exhibit. Which class is always present even though it is not in the configurationsnip?
A. class best-effort
B. class class-default
C. default class
D. best-effort class
E. class class-scavenger
Correct Answer: B
Explanation:
The class-default is in every policy-map by default and it cannot be removed. The class-default class is
used to classify traffic that does not fall into one of the defined classes. Once a packet is classified, all
of the standard mechanisms that can be used to differentiate service among the classes apply. The
class-default class was predefined when you created the policy map, but you must configure it. If no
default class is configured, then by default the traffic that does not match any of the configured
classes is flow classified and given best-effort treatment.
http://www.cisco.com/en/US/docs/ios/12_0t/12_0t5/feature/guide/cbwfq.html#wp25297
