THREE IN DEMAND JUNIPER JN0-281 EXAM QUESTIONS FORMATS

Three in Demand Juniper JN0-281 Exam Questions Formats

Three in Demand Juniper JN0-281 Exam Questions Formats

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Tags: Exam JN0-281 Simulations, JN0-281 Valid Dump, JN0-281 Cert Guide, Reliable JN0-281 Dumps Pdf, JN0-281 Dump Torrent

Take your exam preparation to the next level with ExamDumpsVCE Juniper Practice Test engine. Our practice test engine is designed by experts and features real Data Center, Associate (JNCIA-DC) (JN0-281) practice questions, providing you with a simulated exam environment. By using the practice test engine, you can assess your progress, identify areas of weakness, and master the exam material. This interactive tool enhances your understanding of the actual JN0-281 pattern, ensuring you feel fully prepared on exam day.

Juniper JN0-281 Exam Syllabus Topics:

TopicDetails
Topic 1
  • High Availability: This section of the exam measures the skills of a Data Center Reliability Engineer and covers strategies to ensure continuous network availability. It includes features like Link Aggregation Groups (LAG), Graceful Restart (GR), Bidirectional Forwarding Detection (BFD), and Virtual Chassis. It also provides a basic understanding of how to configure, monitor, and troubleshoot each of these high-availability components to maintain resilient network performance.
Topic 2
  • Data Center Routing Protocols BGP
  • OSPF: This section of the exam measures skills of a Network Operations Specialist and covers the operation and key concepts of the OSPF protocol. It explains elements such as the link-state database, OSPF packet types, and router IDs, including how adjacencies and designated routers work within areas. The section then transitions to BGP, outlining its basic operations, message types, attributes, and the path selection process. It also discusses both IBGP and EBGP roles. Lastly, the section reviews how to configure, monitor, and troubleshoot OSPF and BGP using routing policies and various tools.
Topic 3
  • Data Center Architectures: This section of the exam measures the skills of a Data Center Architect and covers foundational knowledge about various data center designs. It includes traditional multitier architectures as well as more modern IP fabric architectures using spine-leaf topologies. The section also touches on Layer 2 and Layer 3 strategies for forwarding traffic, the differences between overlay and underlay networks, and introduces Ethernet VPN–Virtual Extensible LAN (EVPN-VXLAN), explaining its basic purpose and role in data center environments.
Topic 4
  • Protocol-Independent Routing: This section of the exam measures the skills of a Routing Engineer and covers routing features that function independently of any specific protocol. It includes static, aggregate, and generated routes, along with the concept of martian addresses. Routing instances and Routing Information Base (RIB) groups are introduced, as well as techniques like load balancing and filter-based forwarding. Configuration, monitoring, and troubleshooting aspects of these routing components are also covered in this section.
Topic 5
  • Layer 2 Switching and VLANs: This section of the exam measuresthe skills of a Network Support Engineer and covers the essential concepts of Layer 2 switching operations within Junos OS. It includes an overview of Ethernet switching and bridging, providing an understanding of how Layer 2 networks function. The section also introduces VLAN concepts, focusing on port modes, VLAN tagging methods, and the purpose of Integrated Routing and Bridging (IRB). It further explores the practical side by addressing how to configure, monitor, and troubleshoot both Layer 2 switching and VLANs.

>> Exam JN0-281 Simulations <<

Exam JN0-281 Simulations Is Useful to Pass Data Center, Associate (JNCIA-DC)

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Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q192-Q197):

NEW QUESTION # 192
Exhibit:

Referring to the exhibit, which two statements are correct about default BGP advertisements? (Choose two.)

  • A. When routes advertised by router2 are received by the SP router, they will contain the next-hop address of router2.
  • B. When routes advertised by the SP router are received by router2, they will contain the next-hop address of the SP router.
  • C. When routes advertised by router2 are received by the SP router, they will contain the next-hop address of router1.
  • D. When routes advertised by the SP router are received by router2, they will contain the next-hop address of router1.

Answer: C,D

Explanation:
The exhibit shows a BGP peering scenario between three routers: router1 and router2 are part of the same AS (AS65000), while the SP router is in a different AS (AS65101). This indicates an EBGP (External BGP) peering between the SP router and router1, and IBGP between router1 and router2.
Step-by-Step Breakdown:
Next-Hop Behavior in BGP:
IBGP: In IBGP, the next-hop address is not modified when advertising routes within the same AS. Thus, when router1 advertises routes learned from router2 to the SP router, it will keep the next-hop address of router1, not router2.
EBGP: In EBGP, the next-hop address is modified. When router1 receives routes from the SP router, it will advertise them to router2 with the next-hop address of router1.
Route Propagation:
Routes received by router1 from router2 will be advertised to the SP router with router1 as the next hop.
Similarly, routes advertised by the SP router will be passed on to router2, with router1 remaining as the next hop.
Juniper Reference:
BGP Next-Hop: Juniper's BGP implementations follow standard BGP next-hop behavior, where the next-hop is modified in EBGP but not in IBGP, ensuring proper route advertisement across autonomous systems.


NEW QUESTION # 193
Which statement is correct about aggregate routes?

  • A. The default next hop is discard.
  • B. The default next hop is reject.
  • C. The default next hop is readvertise.
  • D. The default next hop is resolve.

Answer: B

Explanation:
An aggregate route is a summarized route that is created by combining multiple specific routes into a single, broader route. In Junos OS, when an aggregate route is configured, its default next hop is set to reject.
Step-by-Step Explanation:
Aggregate Route:
Aggregate routes are used to reduce the size of routing tables by representing a collection of more specific routes with a single summary route. They help improve routing efficiency and scalability, especially in large networks.
Default Next Hop Behavior:
When you configure an aggregate route in Junos OS, it has a reject next hop by default.
The reject next hop means that if a packet matches the aggregate route but there is no more specific route in the routing table for that destination, the packet will be discarded, and an ICMP "destination unreachable" message is sent to the source.
This behavior helps to prevent routing loops and ensures that traffic isn't forwarded to destinations for which there is no valid route.
Modifying Next Hop:
If needed, the next hop behavior of an aggregate route can be changed to discard (which silently drops the packet) or to another specific next hop. However, by default, the next hop is set to reject.
Juniper Reference:
Junos Command: set routing-options aggregate route <route> reject to configure an aggregate route with a reject next hop.
Verification: Use show route to verify the presence and behavior of aggregate routes.


NEW QUESTION # 194
Which statement is correct about IBGP?

  • A. It ensures that the local and remote peers use different AS numbers.
  • B. It requires a logical full mesh.
  • C. It ensures that duplicate AS numbers are not present in the AS path.
  • D. It requires a physical full mesh.

Answer: B

Explanation:
In IBGP (Internal Border Gateway Protocol), all routers within the same AS (Autonomous System) must have a logical full-mesh topology. This means that every IBGP router must be able to communicate with every other IBGP router directly or indirectly to ensure proper route propagation.
Step-by-Step Breakdown:
Logical Full Mesh:
In an IBGP setup, routers do not re-advertise routes learned from one IBGP peer to another IBGP peer. This rule is in place to prevent routing loops within the AS.
To ensure full route propagation, a logical full mesh is required, meaning every IBGP router must peer with every other IBGP router in the AS. This can be done either directly or via route reflection or confederation.
Physical Full Mesh Not Required:
The physical topology does not need to be a full mesh, but the BGP peering relationships must form a logical full mesh. Techniques like route reflectors or BGP confederations can reduce the need for manual full-mesh peering.
Juniper
Reference: IBGP Configuration: IBGP logical full mesh requirements can be simplified using route reflectors to avoid the complexity of manually configuring many IBGP peers.


NEW QUESTION # 195
Load balancing in routing is used to:

  • A. Automatically update routing tables.
  • B. Encrypt data packets.
  • C. Compress data to improve transmission speed.
  • D. Distribute traffic evenly across multiple paths.

Answer: D


NEW QUESTION # 196
Exhibit:

Referring to the exhibit, which two statements are correct about default BGP advertisements? (Choose two.)

  • A. When routes advertised by router2 are received by the SP router, they will contain the next-hop address of router2.
  • B. When routes advertised by the SP router are received by router2, they will contain the next-hop address of the SP router.
  • C. When routes advertised by router2 are received by the SP router, they will contain the next-hop address of router1.
  • D. When routes advertised by the SP router are received by router2, they will contain the next-hop address of router1.

Answer: C,D

Explanation:
The exhibit shows a BGP peering scenario between three routers: router1 and router2 are part of the same AS (AS65000), while the SP router is in a different AS (AS65101). This indicates an EBGP (External BGP) peering between the SP router and router1, and IBGP between router1 and router2.
Step-by-Step Breakdown:
Next-Hop Behavior in BGP:
IBGP: In IBGP, the next-hop address is not modified when advertising routes within the same AS. Thus, when router1 advertises routes learned from router2 to the SP router, it will keep the next-hop address of router1, not router2.
EBGP: In EBGP, the next-hop address is modified. When router1 receives routes from the SP router, it will advertise them to router2 with the next-hop address of router1.
Route Propagation:
Routes received by router1 from router2 will be advertised to the SP router with router1 as the next hop.
Similarly, routes advertised by the SP router will be passed on to router2, with router1 remaining as the next hop.
Juniper
Reference: BGP Next-Hop: Juniper's BGP implementations follow standard BGP next-hop behavior, where the next-hop is modified in EBGP but not in IBGP, ensuring proper route advertisement across autonomous systems.


NEW QUESTION # 197
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