100% Pass Quiz 2025 Newest JN0-280: Reliable Data Center, Associate (JNCIA-DC) Exam Sample

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Juniper JN0-280 (Data Center, Associate (JNCIA-DC)) Certification Exam is a globally recognized certification program that is designed for individuals who want to gain knowledge and skills in data center networking. JN0-280 exam is designed to validate the candidate's understanding of data center networking technologies, configuration, and troubleshooting techniques. Data Center, Associate (JNCIA-DC) certification program is intended for network professionals, system administrators, and engineers who work with Juniper Networks technologies in data center environments.

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q71-Q76):

NEW QUESTION # 71
Which LSA types are associated with OSPF? (Choose three)

A. Summary LSA (Type 3)
B. External LSA (Type 5)
C. Router LSA (Type 1)
D. Network LSA (Type 2)

Answer: A,C,D

NEW QUESTION # 72
By default, which two statements are correct about BGP advertisements? (Choose two.)

A. BGP peers advertise routes received from IBGP peers to other IBGP peers.
B. BGP peers advertise routes received from EBGP peers to other IBGP peers.
C. BGP peers advertise routes from EBGP peers to other IBGP peers using its own address as thenext hop.
D. BGP peers advertise routes from IBGP peers to EBGP peers using its own address as the next hop.

Answer: B,D

Explanation:
BGP (Border Gateway Protocol)has specific rules for route advertisement between peers.
Step-by-Step Breakdown:
* EBGP to IBGP Route Propagation:
* BGP peers advertise routes learned fromEBGP peerstoIBGP peerswithin the same AS. This ensures that routes learned from external networks are propagated internally within the AS.
* IBGP to EBGP Route Propagation:
* Routes learned fromIBGP peerscan be advertised toEBGP peers, but when advertising these routes, the router uses its own IP address as thenext hop.
* IBGP Split Horizon:
* By default, IBGP peers do not advertise routes learned from one IBGP peer to another IBGP peer. This rule (IBGP split horizon) prevents routing loops within an AS.
Juniper Reference:
* BGP Advertisement Rules: Junos adheres to BGP standards, where IBGP peers do not propagate routes to other IBGP peers, but EBGP peers receive IBGP routes with the advertising router as the next hop.

NEW QUESTION # 73
Exhibit:

Referring to the exhibit, which next hop will be preferred in the routing table?

A. Both next hops will be preferred.
B. Next hop IP address 172.25.20.254 will be preferred.
C. Next hop IP address 172.25.20.200 will be preferred.
D. Neither next hop will be preferred.

Answer: C

Explanation:
In the exhibit, we see a static route configuration with two possible next hops for the default route (0.0.0.0/0):
* next-hop 172.25.20.254with the default preference of 7.
* qualified-next-hop 172.25.20.200with a preference of 6.
Step-by-Step Breakdown:
* Preference Value:In Junos OS, thepreferencevalue is used to determine which route should be preferred in the routing table. The lower the preference value, the higher the priority for the route.
* Comparison:In this case:
* The next hop172.25.20.254has a preference of7.
* Thequalified-next-hop 172.25.20.200has a preference of6.
* Preferred Next Hop:Since172.25.20.200has a lower preference (6) compared to172.25.20.254(7), it will be the preferred next hop in the routing table, assuming both next hops are reachable.
Juniper Reference:
* Qualified Next Hop: In Junos, static routes with multiple next-hop options are selected based on the preference value, with the lower value being preferred.

NEW QUESTION # 74
When troubleshooting an OSPF neighborship, you notice that the router stopped at the ExStart state. What is the cause of this result?

A. There is an MTU mismatch.
B. There is an area ID mismatch.
C. There is an interval timing mismatch.
D. The priority is set to 255.

Answer: A

Explanation:
When an OSPF (Open Shortest Path First) neighborship is stuck in the ExStart state, it usually points to a mismatch in Maximum Transmission Unit (MTU) settings between two routers trying to establish the adjacency. The ExStart state is where OSPF routers negotiate the master-slave relationship and exchange DBD (Database Description) packets.
Step-by-Step Breakdown:
* OSPF Neighbor States: OSPF goes through several states to establish an adjacency with a neighbor:
* Down: No hello packets have been received.
* Init: Hello packets are received, but bidirectional communication isn't confirmed.
* 2-Way: Bidirectional communication is established.
* ExStart: The routers are negotiating who will be the master and who will be the slave, and begin to exchange DBD packets.
* Exchange: The routers start exchanging the database information.
* Loading: The routers process the Link-State Advertisements (LSAs).
* Full: The adjacency is fully established.
* MTU Mismatch Issue:During the ExStart state, both OSPF routers must agree on their MTU values. If there is an MTU mismatch between the two routers, OSPF neighbors will fail to move from the ExStart to the Exchange state. The router with the larger MTU setting will not accept DBD packets from the router with a smaller MTU because the packets may exceed the smaller MTU size.
In Juniper devices, this behavior can be identified by examining the MTU settings using the show interfaces command and ensuring both routers have matching MTU configurations. To resolve this issue, either match the MTU settings on both routers or configure OSPF to ignore MTU mismatches using the command set protocols ospf ignore-mtu.
Juniper Reference:
* Junos Command: show ospf neighbor helps diagnose neighbor states.
* MTU Adjustment: set interfaces <interface-name> mtu <size> can be used to set the MTU values correctly.

NEW QUESTION # 75
Which BGP message type is used to establish peering sessions?

A. Notification
B. Keepalive
C. Update
D. Open

Answer: D

NEW QUESTION # 76
......

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100% Pass Quiz 2025 Newest JN0-280: Reliable Data Center, Associate (JNCIA-DC) Exam Sample

Reliable JN0-280 Exam Sample | Pass-Sure Data Center, Associate (JNCIA-DC) 100% Free Exam Blueprint

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q71-Q76):

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