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Which condition would explain this behavior?

— Exhibit —

— Exhibit —

An ESXi host’s networking is configured as shown. The virtual machine named Fileserver01 is
unable to ping anything on an external network:
Which condition would explain this behavior?

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A.
The vSwitch1 virtual switch does not have an attached vmnic adapter.

B.
The Fileserver01 virtual machine is not running.

C.
vSwitch0 is configured to reject MAC address spoofing.

D.
vmk0 is using a non-routable IP address.

Explanation:

29 Comments on “Which condition would explain this behavior?

  1. chandra says:

    can anyone throw some light on this question. Both Vswitches 0 and 1 are connected to same vmnic0. How is this possible ?? And fileserver01 is clearly powered on as shown in the exhibit…




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  2. b4art says:

    I think this is an IQ question (as so many with VMware).
    Answer D. does NOT answer the question, but what it is TRUE that any IP-address beginning with 172. (like 10. and 198.) are NON routable.

    All other answers are FALSE.




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  3. JanK says:

    A – not true
    B – on picture is ON and how to ping from if is not ON !!!
    C – the similar security option is “MAC Address Changes” but this is not the same
    D – no – vmk0 – is a managment network not for VM OS no efect on rest part of network

    any idea ???!!!




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  4. SMS says:

    Note on the screenshot that Fileserver01 shows disconnected. Anyway only C apply while MAC Address Changes is implemented.
    The point is that all the other sites I’ve checked state that A is correct.




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  5. vmSatGuru says:

    Answer is C
    Agreeing with JanK above
    (No the exact word, but spoofing, can be equal to ā€œMAC Address Changesā€)

    ā€œMAC Address Changesā€ is being set to Reject by default in a distributed switch
    But set to Accept by default with a standard switch.




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  6. Reynholm says:

    Guys…. The real explanation for this is that the answer is correct and it is the image which is wrong.

    On the test, the image shows the machine as truly powered off. Whoever put together this vce is lazy.




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  7. Sue Denim says:

    imho it’s D. 172.16.x.y/16 is routable and the private class B range is 172.16.x.y/16 – 172.31.x.y/16 however it states “EXTERNAL” network, so not directly routable outside of private range however this would work fine with NAT router.

    the picture shows it as not connected but that’s just guff as it’s not an answer, and vmnic in use twice. sloppy screen shotting from the test guys – Ā£162 for a voucher? mmmm….




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  8. Ace says:

    I think there is a mistake in the picture as the vm fileserver01 should not be powered on as shown, If it is still then the options are not correctly framed..




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  9. Ace says:

    First of all vmnic0 on two switches:: incorrect,
    VM shows no connection to the virtual switch, which is incorrect again, even if mac address spoofing is rejected, a connection should have been there,
    for heavens sake it has nothing to do with the ip addresses..
    a virtual machine does not get ip address from a management network..

    conclusion:image is wrong.




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    1. andp75 says:

      Exactly – image is faulty but, similar to Q119, may be on the exam (something for VMware Education to fix)…
      Having said that, however, the only plausible answer (under circumstances) is ‘C’ – vSwitch is configured to reject MAC address spoofing.




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  10. Senthil Venkatachalam says:

    B – is correct. The picture is wrong. When the machine is powered ON you can see it is connected to uplinks (similar to vcenter appliance). I tested in Lab.




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  11. roytheboy says:

    Perhaps the question should be “An ESXi host’s networking is configured as shown. The virtual machine named Fileserver02 is unable to ping anything on an external network:”




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  12. haibo says:

    “VMware vCenter Appliance” has GREEN DOT connection on the switch
    “FileServer01”, “FileServer02” NO GREEN DOT connection on the switch

    Maybe it means: B.The Fileserver01 virtual machine is not (completely) running.




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  13. BUN says:

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    怌Just did the exam (passed). I got this question, and the machine was powered on there too! 怍
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  14. MD says:

    Image has to be wrong BUT:

    IF B.The Fileserver01 virtual machine is not running. – It Could not PING ANYTHING – So WRONG

    IF C.vSwitch0 is configured to reject MAC address spoofing – How can you draw that conclusion – You Can’t – So WRONG

    IF D. vmk0 is using a non-routable IP address. – The 172.16 address is for the MGMT – NOT RELEVANT – So WRONG

    IF A. The vSwitch1 virtual switch does not have an attached vmnic adapter. – VM’s could ping each other BUT NOT External – RIGHT ANSWER

    Answer = A




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  15. simnether says:

    The screenshot linked to this question is wrong. There should have been a screenshot that showed a powered off VM. This screenshot is from another question (120 and also there wrong). vmnic0 is connected to two vSwitches, which is not allowed.




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