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Juniper Exam JN0-351 Topic 9 Question 22 Discussion

Actual exam question for Juniper's JN0-351 exam
Question #: 22
Topic #: 9
[All JN0-351 Questions]

Which two events cause a router to advertise a connected network to OSPF neighbors? (Choose two.)

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Suggested Answer: A, D

Ais correct because when an OSPF adjacency is established, a router will advertise a connected network to OSPF neighbors.An OSPF adjacency is a logical relationship between two routers that agree to exchange routing information using the OSPF protocol1.To establish an OSPF adjacency, the routers must be in the same area, have compatible parameters, and exchange hello packets1.Once an OSPF adjacency is formed, the routers will exchange database description (DBD) packets, which contain summaries of their link-state databases (LSDBs)1.The LSDBs include information about the connected networks and their costs2. Therefore, when an OSPF adjacency is established, a router will advertise a connected network to OSPF neighbors through DBD packets.

Dis correct because when a static route to the 224.0.0.5 address is created, a router will advertise a connected network to OSPF neighbors.The 224.0.0.5 address is the multicast address for all OSPF routers3.A static route to this address can be used to send OSPF hello packets to all OSPF neighbors on a network segment3.This can be useful when the network segment does not support multicast or when the router does not have an IP address on the segment3.When a static route to the 224.0.0.5 address is created, the router will send hello packets to this address and establish OSPF adjacencies with other routers on the segment3. As explained above, once an OSPF adjacency is formed, the router will advertise a connected network to OSPF neighbors through DBD packets.


by Monroe at Jun 29, 2024, 08:43 PM

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Luisa
1 months ago
I'm going to go with A and D, but I can't help but feel like the real answer is B - when the OSPF passive option is enabled. I mean, who doesn't love a good passive-aggressive router? *chuckles*
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Gwen
1 months ago
I believe it's A and D because those are the addresses used for OSPF.
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Matilda
1 months ago
Ah, the old OSPF multicast address trick! I'm going with A and D. The router needs to establish an OSPF adjacency to start advertising the connected network, and creating a static route to the designated router address (224.0.0.5) will also trigger an advertisement. Easy peasy, lemon squeezy!
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Cory
10 days ago
User1: I think it's A and D too. Those are the events that trigger the router to advertise a connected network to OSPF neighbors.
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Lashandra
23 days ago
User2: Yeah, when the OSPF adjacency is established and a static route to 224.0.0.5 is created, the router starts advertising. Simple.
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Bettina
27 days ago
User1: I think it's A and D too. Those are the events that trigger the router to advertise the connected network.
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Bronwyn
1 months ago
I'm not sure, I think it might be A and C.
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Elvera
1 months ago
I agree with Adria, A and D make sense.
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Julianna
1 months ago
This is a tough one! I'm leaning towards A and D, but I can't help but wonder if the answer is a trick question and the router actually advertises the connected network when a static route to 224.0.0.6 is created. After all, that's the OSPF all-designated-routers multicast address, right? *scratches head*
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Adria
1 months ago
I think it's A and D.
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Melvin
1 months ago
I'm going with A and C. A makes sense, but I'm not sure about D - isn't 224.0.0.5 the OSPF all-routers multicast address, not the designated router address?
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Aleta
26 days ago
User 2: Yeah, D is actually the OSPF all-routers multicast address.
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Mozelle
27 days ago
User 1: I think it's A and C too.
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Dorinda
2 months ago
A and D seem like the correct options here. The router will advertise the connected network when an OSPF adjacency is established, and when a static route to the OSPF designated router address (224.0.0.5) is created.
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Lorrine
13 days ago
B) When an interface has the OSPF passive option enabled.
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Kandis
23 days ago
D) When a static route to the 224.0.0.5 address is created.
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Cherelle
24 days ago
A) When an OSPF adjacency is established.
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Jeanice
25 days ago
Yes, those are the correct options. The router needs to establish an OSPF adjacency and have a static route to the designated router address to advertise the connected network.
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Leonora
26 days ago
D) When a static route to the 224.0.0.5 address is created.
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Melinda
28 days ago
A) When an OSPF adjacency is established.
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