Data Center, Professional (JNCIP-DC) Valid Test Topics & JN0-683 Free Download Demo & Data Center, Professional (JNCIP-DC) Practice Test Training

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Juniper JN0-683 Exam Syllabus Topics:

Topic	Details
Topic 1	VXLAN: This part requires knowledge of VXLAN, particularly how the control plane manages communication between devices, while the data plane handles traffic flow. Demonstrate knowledge of how to configure, Monitor, or Troubleshoot VXLAN.
Topic 2	Data Center Interconnect: For Data Center Engineers, this part focuses on interconnecting data centers, covering Layer 2 and Layer 3 stretching, stitching fabrics together, and using EVPN-signaled VXLAN for seamless communication between data centers.
Topic 3	Layer 3 Fabrics: This section measures the knowledge of professionals managing IP-based networks in data centers. It covers IP fabric architecture and routing, ensuring candidates understand how the network is structured for scalability and how traffic is routed efficiently.

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q92-Q97):

NEW QUESTION # 92
You are configuring an EVPN-VXLAN fabric with an edge-routed bridging (ERB) overlay. Where does Layer 3 routing occur in this architecture?

A. At the server leaf (top-of-rack) devices.
B. At a centralized route reflector.
C. At the border leaf devices only.
D. At the spine devices only.

Answer: A

Explanation:
In an edge-routed bridging (ERB) overlay, the integrated routing and bridging (IRB) interfaces and Layer 3 gateway functionality are placed directly on the server leaf devices, moving routing as close to the endpoints as possible. This reduces the need to hairpin traffic through the spine and improves east-west traffic efficiency compared to a centrally-routed bridging (CRB) design.

NEW QUESTION # 93
Exhibit.

The exhibit shows the truncated output of the show evpn database command.
Given this output, which two statements are correct about the host with MAC address 40:00:dc:01:00:04?
(Choose two.)

A. The host is assigned IP address 10.4.4.5.
B. The host is located on VN110002.
C. The host is originating from irb.300.
D. The host is originating from an ESI LAG.

Answer: A,D

Explanation:
* Understanding the Output:
* The show evpn database command output shows the MAC address, VLAN, active source, timestamp, and IP address associated with various hosts in the EVPN instance.
* Analysis of the MAC Address:
* Option A:The MAC address 40:00:dc:01:00:04 is associated with the IP address 10.4.4.5, as indicated by the output in the IP address column. This confirms that this host has been assigned the IP 10.4.4.5.
* Option D:The active source for the MAC address 40:00:dc:01:00:04 is listed as 00:02:00:00:00:
04:00:04:00:00:04:00:04, which indicates that the host is connected via an ESI (Ethernet Segment Identifier) LAG (Link Aggregation Group). This setup is typicallyused in multi-homing scenarios to provide redundancy and load balancing across multiple physical links.
Conclusion:
* Option A:Correct-The host with MAC 40:00:dc:01:00:04 is assigned IP 10.4.4.5.
* Option D:Correct-The host is originating from an ESI LAG, as indicated by the active source value.

NEW QUESTION # 94
Which two statements are correct about an IP fabric? (Choose two.)

A. The multipath multiple-as statement is required to enable ECMP if every device has a different AS number.
B. Only a single point to point EBGP session is required between peers in an IP fabric.
C. EBGP is only required to route most routing information to external devices outside the fabric.
D. All leaf devices can use the same AS number in an IP fabric without making any adjustments to the EBGP configuration

Answer: A,B

Explanation:
When each device in the IP fabric has a different AS number, the BGP "multipath multiple-as" statement must be enabled to allow ECMP (Equal-Cost Multi-Path) across EBGP peers with different ASNs.
EBGP sessions in an IP fabric are established as single point-to-point sessions between directly connected devices, typically leaf-to-spine, allowing for scalable and straightforward peering.

NEW QUESTION # 95
Which two requirements are needed to facilitate over-the-top DCI? (Choose two.)

A. All spine loopbacks in each network must be reachable.
B. All leaf VTEPs in each network must be reachable.
C. EVPN route-types must be advertised to all spine devices.
D. EVPN route-types must be advertised to all leaf devices.

Answer: B,D

Explanation:
All leaf VTEPs in each network must be reachable: In over-the-top Data Center Interconnect (DCI) using EVPN-VXLAN, the leaf VTEPs (VXLAN Tunnel Endpoints) in both data centers need to be reachable from each other. This is crucial for the successful exchange of VXLAN traffic and the proper operation of the overlay network between the data centers.
EVPN route-types must be advertised to all leaf devices: To extend Layer 2 and Layer 3 services seamlessly across data centers in OTT DCI, EVPN route types must be advertised to all leaf devices to maintain the unified control plane and support endpoint reachability.

NEW QUESTION # 96
Exhibit.

Both DC and DC2 ate using EVPN-VXLAN technology deployed using an ERB architecture. A server on the Red VLAN must communicate with a server on the Green VLAN. The Blue VLAN in DC and DC2 needs to be the same VLAN.
Which statement is correct in this scenario?

A. An interconnect is required between four leaf devices in the services blocks; the Red VLAN and the Green VLAN must be stitched and the Blue VLAN must be stretched.
B. An interconnect is required between the four SRX Series devices; the Blue VLAN must be stretched and a transit VNI must be added for the Red and Green VLANs.
C. A lean super spine device must be added to DC and DC2; all VLANs must be stretched to the lean super spine device and the lean super spine devices must stitch all the VLANs together.
D. The eight spine devices must be configured as border spine devices; a full mush interconnect must exist between all eight spine devices and the Blue VLAN must be stitched together

Answer: B

Explanation:
* ERB Architecture in EVPN-VXLAN:
* ERB (Edge Routed Bridging) architecture is commonly used in data center networks where routing decisions are made at the network edge (leaf or border devices), while bridging (Layer 2 forwarding) is extended across the fabric. This architecture allows for efficient L3 routing while still enabling L2 services like VLANs to span across multiple locations.
* VLAN and VNI Configuration:
* The scenario specifies that a server on the Red VLAN needs to communicate with a server on the Green VLAN. Since these VLANs are in different data centers (DC and DC2), and given the use of EVPN-VXLAN, the communication between these VLANs will require atransit VNI(Virtual Network Identifier). This transit VNI will allow traffic to traverse the VXLAN tunnel across the DCI (Data Center Interconnect).
* Interconnect between SRX Series Devices:
* The exhibit shows SRX Series Chassis Clusters used as service devices (likely for firewalling or other security services). These devices need to be interconnected between the two data centers to ensure that VLANs can communicate effectively. The Blue VLAN needs to be stretched between DC and DC2 to maintain the same Layer 2 domain across both data centers.
Conclusion:
* Option B:Correct-Interconnecting the SRX Series devices will ensure the necessary service chaining, while stretching the Blue VLAN and adding a transit VNI for the Red and Green VLANs will enable the required communication across the data centers.

NEW QUESTION # 97
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