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JNCIA-JUNOS Practice Exam Question Query

  • 1.  JNCIA-JUNOS Practice Exam Question Query

    Posted 22 days ago

    I am just starting the road for JNCIA-JUNOS certification. I started at the practice exam here (which presumably based on the update date is for the old/current 104 version not 105 that comes in next week):

    Junos, Associate (JNCIA-Junos) Certification Practice Exam

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    Junos, Associate (JNCIA-Junos) Certification Practice Exam
    This practice test is designed to help you to prepare for the live exam. At the end of the test, you will be provided with the correct response(s) for each question, as well as an explanation for why each response is correct.
    View this on Juniper >

    On reviewing the questions I got wrong I understand  the reason for all, except this one. To me answers 1 & 4 looked the same, just different protocols - hence why I selected them. On reading it again this morning I can see SCP traffic "exits" and SFTP "is destined for". Presumably the fact that we don't have confirmation the SFTP traffic exited the router is the reason that answer 4 is wrong. But it seems badly worded to try and trip you up.



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    SIMON COLLINS
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  • 2.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 22 days ago

    Simon,

    The new JNCIA-Junos 105 practice exam should be live this week because the new exam has been released. It should be very similar in topics and questions as the current exam though.

    In regards to your question query, the reason option 4 is not correct is because the traffic is destined to the local device. The wording of the answer indicates to me that the traffic comes in one interface with a destination address of a separate interface on the device, like a loopback interface or a different Ethernet interface. 

    I hope this helps.



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    Josh Verhaal
    Certification and Courseware developer @ Juniper Networks
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  • 3.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 21 days ago

    Thanks for the update on the 105 exam Josh - appreciate that.

    Re: Question 4 - if that were the case then Answer 1 would also be wrong (per the green ticks Answers 1 & 2 are the correct two answers according to the exam review). Answers 1 and 4 only differ by 4 words (and one of those is differing protocol SCP vs SFTP).  Both are going to a different egress port than which they entered the device. The only difference is that for A1 it uses the word "exit" and A4 uses the phrase "is destined for". All I can think is that "destined for" does not mean the traffic actually got to the 2nd interface as was blocked by some filter or policy. But that is a big assumption.



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    SIMON COLLINS
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  • 4.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 20 days ago

    Simon,

    Thanks for your feedback. Of those four words, two of them are very important for being right or wrong. In option 1 the word "exits", as in leaving, the device. While in option 4 the word "destined", as in destination, for another interface on the device. I think it is a stretch to assume the traffic is meant to leave the device when the phrase "destined for" is used.

    I will review the new practice item bank and ensure this practice exam question is not on it. If it is, I will remove it from the pool to avoid this confusion in the future.



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    Josh Verhaal
    Certification and Courseware developer @ Juniper Networks
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  • 5.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 18 days ago

    Thanks @Josh Verhaal - if it was just me confusing it I would just ignore it but others I asked also found it confusing and looking on google it seems to have been causing confusion all around.



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    SIMON COLLINS
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  • 6.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 21 days ago

    Hi Simon

    The question is asking you to identify the 'transit' traffic i.e. traffic that is not destined for the local device. HTH.



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    JONATHAN HOOKER
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  • 7.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 21 days ago

    Hi Jonathan. I understand that part which is why Answer 3 is easily ruled out. But that logic only works for Answer 4 if "another interface on the local router" is something like a loopback or mgmt interface (but we are not provided with that information). But considering they use the exact same terminology for Answer 1 that seems very misleading to me (and several others whom I have shown this question to). The only difference there is the use of "exit" instead of "destined for". 



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    SIMON COLLINS
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  • 8.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 21 days ago

    Hi Simon

    Traffic that does not leave the local router is not transit traffic.

    In answers 1 and 2 the traffic exits the local device; in answers 3 and 4 it does not

    What are two examples of transit traffic? (Choose two.)

    1. SCP traffic that enters one interface and exits another interface on the local router
    2. STFP traffic that enters and exits the same interface on the local router
    3. SCP traffic that is destined for the router's loopback interface
    4. SFTP traffic that enters one interface and is destined for another interface on the local router

    HTH



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    JONATHAN HOOKER
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  • 9.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 21 days ago

    I think the wording of these answers is confusing in the form presented.  I can only imagine how much more confusing they would be for non native english speakers.

    These statements fail to make crystal clear when the flow is self traffic versus passed through to devices outside the local router.

    Questions like these are the reason I've always had difficulties with certification tests despite getting over 30 from seven different organizations.  Why do exam writers feel this need to be obtuse?



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    Steve Puluka BSEET - Juniper Ambassador
    IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
    http://puluka.com/home
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  • 10.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 21 days ago

    @JONATHAN HOOKER - I guess I am just reading it too literally, in that traffic can be destined for another interface to use it as an exit / egress point whereas it seems to mean it actually terminates on that interface e.g. to the interfaces direct IP address (therefore never leaves the router).

    @spuluka - agree completely. For me, a native english speaker, (and everyone else I sent this question to) the answers are worded in a way to try and catch you out and I don't think the answer explanation offers enough differentiation. Certainly I would hope I don't get a question like this in the actual exam.



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    SIMON COLLINS
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  • 11.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 21 days ago

    @SIMON COLLINS, @spuluka

    I think the term 'destined for' in this case is clear. It goes to show how difficult it can be to write concise and clear questions.

    If the meaning of 'destined for' was to be another interface to then use that other interface as an egress interface (i.e. "in that traffic can be destined for another interface to use it as an exit / egress point"), that would surely overlap with the definition of transit.



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    JONATHAN
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  • 12.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 20 days ago

    Why can you not just say destined for the routing engine?

    Surely the exam is testing do we know whether or not transit traffic leaves the device or is processed by the local device, making that clear in the answers does that job.

    If the answers use euphemisms instead they become less and less clear.  The point is do we know local destination is NOT transit or not.  Why try to make the question less clear? 



    ------------------------------
    Steve Puluka BSEET - Juniper Ambassador
    IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
    http://puluka.com/home
    ------------------------------



  • 13.  RE: JNCIA-JUNOS Practice Exam Question Query

    Posted 20 days ago

    I would assume the question is trying to determine if the reader understands the difference using actual traffic examples.



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    JONATHAN
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