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Juniper JN0-281 Exam Syllabus Topics:

Topic	Details
Topic 1	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 2	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 3	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 4	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.
Topic 5	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.

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q49-Q54):

NEW QUESTION # 49
Which signaling protocol is used for EVPN?

A. PIM
B. IS-IS
C. BGP
D. OSPF

Answer: C

Explanation:
EVPN (Ethernet Virtual Private Network) is a standard protocol used for building Layer 2 and Layer 3 VPNs over an IP or MPLS network. The signaling protocol used for EVPN is BGP (Border Gateway Protocol).
Step-by-Step Breakdown:
BGP as the EVPN Signaling Protocol:
EVPN uses BGP to exchange MAC address reachability information between routers (PE devices). This enables devices to learn which MAC addresses are reachable through which PE devices, facilitating Layer 2 forwarding across an IP or MPLS core.
BGP Extensions for EVPN:
BGP is extended with new address families (e.g., EVPN NLRI) to carry both MAC and IP address information, allowing for scalable and efficient multi-tenant network solutions.
Juniper Reference:
Junos EVPN Configuration: Juniper uses BGP as the control plane for EVPN to exchange MAC and IP route information between different data center devices.

NEW QUESTION # 50
Which OSPF router type connects an OSPF area to non-OSPF networks?

A. Backbone Router
B. Area Border Router (ABR)
C. Autonomous System Boundary Router (ASBR)
D. Internal Router

Answer: C

NEW QUESTION # 51
What does filter-based forwarding in networking typically allow?

A. Load balancing across multiple CPUs
B. Aggregation of multiple routes into a single entry
C. Forwarding decisions based on MAC addresses
D. Routing decisions based on extended criteria like packet headers

Answer: D

NEW QUESTION # 52
In the context of Layer 2 switching, what does RSTP stand for?

A. Resilient Switching Transport Protocol
B. Routing Switch Transport Protocol
C. Rapid Spanning Tree Protocol
D. Redundant Switching Tree Protocol

Answer: C

NEW QUESTION # 53
Which static routing parameter will silently drop the packet if it is set as the next hop?

A. Resolve
B. Reject
C. Readvertise
D. Discard

Answer: D

Explanation:
When the discard option is configured as the next hop for a static route, it silently drops any packets that match the route without sending any notification to the sender.
Step-by-Step Breakdown:
Discard Behavior:
If a route uses the discard next hop, the router drops the packet without generating any ICMP message or error back to the sender. This is useful for creating null routes to prevent routing loops or blackhole traffic intentionally.
Reject vs. Discard:
The reject next hop, in contrast, drops the packet but sends an ICMP Destination Unreachable message back to the source.
Juniper Reference:
Static Route Behavior: In Junos, the discard option ensures packets matching a static route are dropped silently, providing a way to discard traffic without alerting the source.

NEW QUESTION # 54
......

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Latest JN0-281 Dumps Pdf | JN0-281 Reliable Exam Camp

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Juniper JN0-281 Exam Syllabus Topics:

Juniper Data Center, Associate (JNCIA-DC) Sample Questions (Q49-Q54):

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