Apr
20

Fans of the wildly popular CCIE Written Bootcamp need to check out Practice Exam 2 which has been updated with some more thought-provoking Quality of Service (QoS) questions that will help with the CCIE R&S Written as well as the Lab exam.

For some fun for all, try this question on for size:

Match the QoS marking with the correct definition:

QoS Marking

1. DSCP EF

2. DSCP 20

3. IP PREC 5

4. DE

5. CLP

6. EXP BITS

Definition

a. ATM

b.Diff Serv VoIP

c. Frame Relay

d. MPLS

e.Legacy VoIP Marking

f. Assured Forwarding 22 

The answer is posted in the comments. Enjoy.


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13 Responses to “How is Your QoS Core Knowledge?”

 
  1. 1. b
    2. f
    3. e
    4. c
    5. a
    6. d

  2. Brandon says:

    Man, I actually got this correct…without looking first..;-).

  3. Franco Isaac says:

    1 = b
    2 = f
    3 = e
    4 = c
    5 = a
    6 = d

    Regards

    Franco

  4. Michael says:

    This was great! I got them all right as well!

  5. Mark says:

    Ditto…

  6. AJN says:

    1. DSCP EF – e.Legacy VoIP Marking

    2. DSCP 20 (=2*8 +2*2 +0) – f. Assured Forwarding 22

    3. IP PREC – 5 b.Diff Serv VoIP

    4. DE – c. Frame Relay

    5. CLP – a. ATM

    6. EXP BITS – d. MPLS

  7. AJN says:

    Corrected
    1. DSCP EF – 5 b.Diff Serv VoIP
    3. IP PREC – e.Legacy VoIP Marking

  8. segun says:

    too simple

  9. cabrero says:

    100% correct, i am on fire !! lol

  10. Hudson says:

    I got 1,4,5,6 easily and 3, but number 2, I used the elimination method. Please could somebody explain to me how to derive the DSCP value…say DSCP 20

  11. kazeumi says:

    BTW: RFC 5462 renamed the exp field to Traffic Class.
    http://tools.ietf.org/html/rfc5462

  12. Mo_1980 says:

    1. DSCP EF b.Diff Serv VoIP
    2. DSCP 20 f. Assured Forwarding 22
    3. IP PREC 5 e.Legacy VoIP Marking
    4. DE c. Frame Relay
    5. CLP a. ATM
    6. EXP BITS d. MPLS

  13. Shane says:

    Nice, I got it without looking.
    Great post btw

 

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