Juniper Exam JN0-363 Topic 4 Question 51 Discussion

Actual exam question for Juniper's JN0-363 exam

Question #: 51
Topic #: 4

How does a Junos device learn about MAC addresses when II is first connected to an Ethernet LAN?

AThe device sends out a network broadcast message asking tor all devices and MAC addresses on the network and stores this information In addition lo the interface from which the response was received.

BThe device learns the destination MAC addresses from traffic in the network and stores this MAC address in addition to the interface from which the traffic was received.

CThe device learns the source MAC addresses from traffic in the network and stores this MAC address in addition to the interface from which the traffic was received.

DThe device sends out a network multicast message asking for all devices and MAC addresses on the network and stores this Information in addition to the interface from which the response was received.

Show Suggested Answer

Suggested Answer: B, D

static route with a next-hop of next-table pointing to the appropriate routing table which contains more accurate information rib-groups to mirror routing information from one route-table to another. However, in many cases, in order to make this work, interface-routes also need to be mirrored. RIB Group policy can be used to constrain the routing information instance-import and instance-export statements configured within the individual routing-instances to leak routes from one table to another. Again, policy can be used here to constrain the routing information. This method is more straightforward than the rib-group method A final approach is to use physical interfaces or logical-tunnels to stitch routing-instances and use a routing protocol or static routes across this connection between the two routing-instances.

by Ciara at Jan 24, 2025, 12:27 AM

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Jerrod

15 days ago

Option C makes the most sense. The Junos device isn't going to waste its time with broadcasts or multicasts, it's going to learn those MAC addresses the old-fashioned way: by eavesdropping on the network traffic. That's how the cool kids do it these days.

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Gladys

17 days ago

Hey, I heard the Junos device has a secret handshake it does with all the other devices on the network to learn their MAC addresses. No, just kidding, C is the right answer. It's all about that traffic, baby!

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Sanda

1 months ago

Aha! C is the way to go. The Junos device is a smart cookie, it knows how to learn those MAC addresses from the traffic it sees. No need for any fancy broadcasts or multicasts.

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2 months ago

I think the answer is C.

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