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Exam 2V0-642 topic 1 question 75 discussion

Actual exam question from VMware's 2V0-642
Question #: 75
Topic #: 1
[All 2V0-642 Questions]

An NSX Administrator is examining traffic on the network shown below.

What is the packet flow when VM1 communicates to VM5?

  • A. Host A will perform a destination lookup, route the packet, switch the packet onto segment 5002, then encapsulate and send the packet to Host C.
  • B. Host A will perform a destination lookup, switch the packet onto segment 5002, route the packet, then encapsulate the packet and send it to the DLR control VM.
  • C. Host A will encapsulate the packet, send the encapsulated packet to host C, Host C will perform a destination lookup and switch the packet onto segment 5002.
  • D. Host A will encapsulate the packet, perform a destination lookup, route the packet to the DLR control VM, the control DLR will bridge the packet onto segment
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by Imran_Ahmad_Khan at Sept. 27, 2019, 7:56 p.m.

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duke_srg
Highly Voted 5 years, 7 months ago
A. is the correct answer. Refer to the Reference Design p.54.
upvoted 5 times
Me_Loi1
5 years, 1 month ago
Correct, routing happens at source and gets "switched" over to the lookuped destination VNI LIF before leaving host over VTEP: https://docs.vmware.com/en/VMware-NSX-Data-Center-for-vSphere/6.2/com.vmware.nsx.troubleshooting.doc/GUID-3D5B1AAC-6408-4B41-8691-7D5D51A51D23.html
upvoted 1 times
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rugginic
Most Recent 5 years ago
The document says that it is always the DLR on the source host that is performing the routing so it should be "D"
upvoted 1 times
kkzz82
5 years ago
Can't be D as packet will not cross the Control VM, A should be the correct one
upvoted 1 times
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cthd
5 years ago
The question is asking how a L3 forwarding works, so must be A
upvoted 1 times
Ibbu
5 years ago
did you attempt the exam
upvoted 1 times
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ego004
5 years, 8 months ago
Definitely not A, its C
upvoted 1 times
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Imran_Ahmad_Khan
5 years, 9 months ago
I think answer should be D
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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