During OSPF adjacency formation between two Juniper routers, the routers are in the Exchange state. Router A has sent a Database Description packet to Router B. Router B determines that it needs a more recent version of a specific LSA that Router A has. Which packet type will Router B send to Router A?

A Database Description packet with the I-bit set to restart the exchange.

A Link State Acknowledgment packet with a request flag set.

A Link State Update packet containing the requested LSA.

A Link State Request packet listing the LSA by type, ID, and advertising router.

An OSPF router has sent a Link State Update packet to a neighbor but has not received a Link State Acknowledgment packet within the retransmission interval. What will the router do?

It will retransmit the Link State Update packet to the neighbor.

It will tear down the adjacency and re-establish it.

It will wait for the next hello interval to resend the LSA.

It will send a Link State Request packet to the neighbor to ask if the LSA was received.

When does a router send a Link State Request packet to a neighbor?

When it receives a Hello packet from a new neighbor

When it needs to acknowledge receipt of an LSA

When it detects that an LSA in its database is missing or outdated

When it wants to flood a new LSA to all neighbors

What is the purpose of the Link State Acknowledgment packet in OSPF?

To confirm receipt of a Link State Update packet

To request a specific LSA from a neighbor

To discover neighbors on a network segment

To exchange database summaries during adjacency formation

Juniper NetworksCertified Specialist, Service Provider Routing and Switching (JNCIS-SP)

Domain 2Objective 2

OSPF Packet Types JN0-364 Practice Questions (Page 5)

Part of the Open Shortest Path First (OSPF) domain, which makes up ~15% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–9 in this domain), expect 1–1 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

6concepts

Questions 21–24

21application · medium
During OSPF adjacency formation between two Juniper routers, the routers are in the Exchange state. Router A has sent a Database Description packet to Router B. Router B determines that it needs a more recent version of a specific LSA that Router A has. Which packet type will Router B send to Router A?
Select an answer first
22application · medium
An OSPF router has sent a Link State Update packet to a neighbor but has not received a Link State Acknowledgment packet within the retransmission interval. What will the router do?
Select an answer first
23foundation · easy
When does a router send a Link State Request packet to a neighbor?
Select an answer first
24foundation · easy
What is the purpose of the Link State Acknowledgment packet in OSPF?
Select an answer first

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OSPF Packet Types JN0-364 Practice Questions (Page 5)

Questions 21–24

An OSPF router has sent a Link State Update packet to a neighbor but has not received a Link State Acknowledgment packet within the retransmission interval. What will the router do?

When does a router send a Link State Request packet to a neighbor?

What is the purpose of the Link State Acknowledgment packet in OSPF?

Keep studying — Open Shortest Path First (OSPF)