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Exam JN0-649 topic 1 question 19 discussion

Actual exam question from Juniper's JN0-649

Question #: 19
Topic #: 1

Click the Exhibit button.
You want to provide Layer 2 connectivity between campus sites using Ethernet switches through a metro Ethernet service provider who is using Q-in-Q tagging on their network.
Referring to the exhibit, what are two design considerations in this environment? (Choose two.)

A. VXLAN could be implemented on your network across this service provider network.
B. Each campus switch shown must have a C-Tag 300 configured.
C. L2PT is required on the SP network to support the spanning tree protocol.
D. Each campus switch shown must have S-Tag 300 configured.

Show Suggested Answer

Suggested Answer: AC 🗳️

by mohdema at Dec. 6, 2022, 1:01 p.m.

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somanyquestions

Highly Voted 1 year, 9 months ago

Selected Answer: AC

A. VXLAN could be implemented on your network across this service provider network. could be a valid option. B. Each campus switch shown must have a C-Tag 300 configured. no, since the provider is using S-Tag 300 and QinQ, you can use C-Tag 300 but also other, it's not a must. C. L2PT is required on the SP network to support the spanning tree protocol. yes, is needed! D. Each campus switch shown must have S-Tag 300 configured. no, the S-Tag is taken care of the providers QinQ

upvoted 7 times

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oz1i

Most Recent 1 year ago

Selected Answer: AC

AC is correct.

upvoted 1 times

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rfg8366

1 year, 1 month ago

Is fair to say, that considering that this is not an EVPN related question, CD do seem to be correct

upvoted 2 times

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Yunas

1 year, 11 months ago

A can be correct as we have layer 3 access to the all Camnpus's switche loopback ip address.

upvoted 1 times

rchp

2 weeks ago

This question does not mention loopback reachability. "You want to provide Layer 2 connectivity"

upvoted 1 times

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sangki

2 years, 6 months ago

i think bc s-tag is handled by SP.

upvoted 3 times

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JoeSun

2 years, 7 months ago

Selected Answer: BC

VXLAN , L2PT and S-Tag(service VLAN) are handled by ISP. C-Tag (customer VLAN) is handled by customer. In fact, in customer view, 2 campus switches are direct connected to each others so that they have to configure same vlan info whatever it is trunk or access port.

upvoted 1 times

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mohdema

2 years, 7 months ago

Selected Answer: CD

https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/ref/statement/layer2-protocol-tunneling-edit-vlans-l2pt-ex-series.html

upvoted 4 times

hbstyleboy

2 years, 4 months ago

What is this B.S ? The link doesn't even justify your answers at all. Don't troll plz. Administer should ban MF like u

upvoted 2 times

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