Latest Juniper JN0-683 Questions - Get Essential Exam Knowledge [2026]

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Juniper JN0-683 Exam Syllabus Topics:

TopicDetails
Topic 1
  • EVPN-VXLAN Signaling: This section assesses an understanding of Ethernet VPN (EVPN) concepts, including route types, multicast handling, and Multiprotocol BGP (MBGP). It also covers EVPN architectures like CRB and ERB, MAC learning, and symmetric routing.
Topic 2
  • 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.
Topic 3
  • 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 4
  • Data Center Multitenancy and Security: This section tests knowledge of single-tenant and multitenant data center setups. Candidates such as Data Center Professionals are evaluated on ensuring tenant traffic isolation at both Layer 2 and Layer 3 levels in shared infrastructure environments.
Topic 5
  • 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.

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q21-Q26):

NEW QUESTION # 21
Exhibit.

Referring to the exhibit, when Host A sends an ARP request for Host B's IP address, which Junos feature does leaf1 require to send an ARP response back to Host A without having to send a broadcast frame over the fabric?

Answer: D

Explanation:
* Scenario Overview:
* In the exhibit, Host A is trying to resolve Host B's IP address (10.10.1.2) through ARP (Address Resolution Protocol). Normally, an ARP request would be broadcasted over the network, and the host owning the IP address (Host B) would respond.
* Role of Proxy ARP:
* Option A:Proxy ARPallows a router or switch (in this case, leaf1) to respond to ARP requests on behalf of another host. Leaf1, knowing the MAC address of Host B through the EVPN MAC advertisement, can reply to Host A's ARP request directly without broadcasting the request across the entire network fabric. This feature reduces unnecessary traffic and increases network efficiency.
Conclusion:
* Option A:Correct-Proxy ARP enables leaf1 to respond to Host A's ARP request for Host B's IP without broadcasting over the IP fabric, thus providing the ARP response locally.


NEW QUESTION # 22
Click the Exhibit button. You are deploying a VXLAN overlay with EVPN as the control plane in an ERB architecture.
Referring to the exhibit, which three statements are correct about where then VXLAN gateways will be placed? (Choose three.)

Answer: A,B,D

Explanation:
Spine devices will have no VXLAN gateways: In a typical VXLAN-based architecture with EVPN, spine devices do not function as VXLAN gateways. Their role is to provide connectivity and forwarding for VXLAN traffic, but they do not act as gateways for Layer 2 or Layer 3.
Only the border and leaf devices will have L3 VXLAN gateways: In an EVPN-VXLAN setup, L3 VXLAN gateways are typically placed on the border and leaf devices. These devices are responsible for bridging between Layer 2 and Layer 3 domains, handling routing for traffic that needs to go between different VXLAN segments or between VXLAN and external networks.
All leaf devices will have L2 VXLAN gateways: Leaf devices often function as L2 VXLAN gateways. They handle the bridging between VXLAN segments and provide Layer 2 connectivity for hosts within the same VXLAN.


NEW QUESTION # 23
Which two statements are true about EVPN routes for Data Center Interconnect? (Choose two.)

Answer: A,B

Explanation:
Type 5 EVPN routes (IP Prefix Routes) are used for Layer 3 (IP) interconnects between data centers. These routes do not require a VXLAN tunnel because they are IP-routed instead of being MAC-based like Type 2 routes. The next-hop resolution happens at the IP layer, not at the VXLAN tunnel level.
Type 2 EVPN routes (MAC/IP Advertisement Routes) are used to transport MAC addresses and associated IP addresses of endpoints. Since Type 2 routes are Layer 2-based, they require a VXLAN tunnel between the VTEPs (Virtual Tunnel Endpoints) to forward Ethernet frames correctly.


NEW QUESTION # 24
Which three EVPN split horizon rules will a VTEP implement when receiving BUM traffic from a local host? (Choose three.)

Answer: A,B,E

Explanation:
When a VTEP receives BUM traffic from a local host, it performs normal flooding behavior within the broadcast domain. The frame is replicated to other local interfaces in the same VLAN. It is also replicated to remote VTEPs participating in the same VLAN/VNI for inter-VTEP flooding.
Split-horizon logic prevents sending the flooded frame back out the interface toward the originating host.


NEW QUESTION # 25
Which two statements are true about IP fabrics using unnumbered BGP? (Choose two.)

Answer: A,D

Explanation:
BGP unnumbered peering uses only link-local IPv6 addresses on interfaces to automatically discover and establish BGP peer sessions. No routable IP addresses are required on the underlay interfaces.
You must configure the interfaces with family inet6 to enable the link-local IPv6 addresses used for peering.
The BGP peering session is dynamically created based on interface names, which simplifies the configuration significantly compared to manual peering with routable IP addresses.
The peer IP and remote AS numbers are automatically configured for BGP unnumbered peering.
This means unnumbered BGP automatically provisions IPv6 peering using the link-local addresses.
It also supports IPv4 route exchange over the IPv6 next-hop established by unnumbered BGP.
https://www.juniper.net/documentation/us/en/software/nce/nce-225-bgp-unnumbered/index.html


NEW QUESTION # 26
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