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JN0-683 Exam Torrent: Data Center, Professional (JNCIP-DC) & JN0-683 Practice Test

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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 Deployment and Management: This section assesses the expertise of data center networking professionals like architects and engineers, focusing on key deployment concepts. Topics include Zero-touch provisioning (ZTP), which automates device setup in data centers without manual input.

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.

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JN0-683 Passguide & Training JN0-683 Tools

The Pass4sureCert offers three formats of study materials for the Data Center, Professional (JNCIP-DC) (JN0-683) certification exam preparation. Our product is designed by experts in their respective fields, ensuring that our customers receive the most up-to-date and accurate Juniper JN0-683 Exam Questions.

Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q24-Q29):

NEW QUESTION # 24
You are using EBGP peering in an underlay IP fabric.
Which two statements are correct in this scenario? (Choose two.)

A. EBGP peering does not require an IGP protocol tor adjacency establishment.
B. EBGP peering requires an IGP protocol tor adjacency establishment.
C. Every leaf node has a peering session to every other leaf node.
D. Every leaf node has one peering session to every spine node.

Answer: A,D

Explanation:
Every leaf node has one peering session to every spine node: In an EBGP peering setup within an underlay IP fabric, each leaf node typically establishes a single EBGP session with each spine node. This is a common design for scalability, as it ensures that the leaf nodes can exchange routing information with all spine nodes directly.
EBGP peering does not require an IGP protocol for adjacency establishment: EBGP (External BGP) peering in an underlay IP fabric does not require an IGP (Interior Gateway Protocol) such as OSPF or IS-IS to establish peering relationships. EBGP is used for establishing external routing between different ASes, and within a single AS, the peering is established directly between devices. This eliminates the need for an IGP for the actual EBGP session.

NEW QUESTION # 25
A local VTEP has two ECMP paths to a remote VTEP
Which two statements are correctwhen load balancing is enabled in this scenario? (Choose two.)

A. The source port in the UDP header is used to load balance VXLAN traffic.
B. The inner packet fields are used in the hash for load balancing.
C. The destination port in the UDP header is used to load balance VXLAN traffic.
D. The inner packet fields are not used in the hash for load balancing.

Answer: A,B

Explanation:
* Load Balancing in VXLAN:
* VXLAN uses UDP encapsulation to transport Layer 2 frames over an IP network. For load balancing across Equal-Cost Multi-Path (ECMP) links, various fields in the packet can be used to ensure even distribution of traffic.
* Key Load Balancing Fields:
* C. The source port in the UDP header is used to load balance VXLAN traffic:This is correct.
The source UDP port in the VXLAN packet is typically calculated based on a hash of the inner packet's fields. This makes the source port vary between packets, enabling effective load balancing across multiple paths.
* D. The inner packet fields are used in the hash for load balancing:This is also correct. Fields such as the source and destination IP addresses, source and destination MACaddresses, and possibly even higher-layer protocol information from the inner packet can be used to generate the hash that determines the ECMP path.
* Incorrect Statements:
* A. The inner packet fields are not used in the hash for load balancing:This is incorrect as the inner packet fields are indeed critical for generating the hash used in load balancing.
* B. The destination port in the UDP header is used to load balance VXLAN traffic:This is incorrect because the destination UDP port in VXLAN packets is typically fixed (e.g., port 4789 for VXLAN), and therefore cannot be used for effective load balancing.
Data Center References:
* Effective load balancing in VXLAN is crucial for ensuring high throughput and avoiding congestion on specific links. By using a combination of the source UDP port and inner packet fields, the network can distribute traffic evenly across available paths.

NEW QUESTION # 26
Which parameter is used to associate a received route with a local VPN route table?

A. route-target community
B. route-distinguisher
C. VLAN ID
D. VNI

Answer: A

Explanation:
* Understanding VPN Route Table Association:
* In MPLS/VPN and EVPN networks, theroute-target communityis a BGP extended community attribute used to control the import and export of VPN routes. It associates received routes with the appropriate VPN route tables on the PE (Provider Edge) routers.
* Function of Route-Target Community:
* The route-target community tag ensures that routes are imported into the correct VRF (Virtual Routing and Forwarding) instance, allowing them to be correctly routed within the VPN.
Conclusion:
* Option A:Correct-The route-target community is used to associate received routes with a local VPN route table.

NEW QUESTION # 27
Exhibit.

You are troubleshooting a DCI connection to another data center The BGP session to the provider is established, but the session to Border-Leaf-2 is not established. Referring to the exhibit, which configuration change should be made to solve the problem?

A. delete protocols bgp group UNDERLAY advertise-external
B. delete protocols bgp group OVERLAY accept-remote-nexthop
C. set protocols bgp group overlay export loopbacks
D. set protocols bgp group PROVIDER export LOOPBACKS

Answer: B

Explanation:
* Understanding the Configuration:
* The exhibit shows a BGP configuration on a Border-Leaf device. The BGP group UNDERLAY is used for the underlay network, OVERLAY for EVPN signaling, and PROVIDER for connecting to the provider network.
* The OVERLAY group has the accept-remote-nexthop statement, which is designed to accept the next-hop address learned from the remote peer as is, without modifying it.
* Problem Identification:
* The BGP session to Border-Leaf-2 is not established. A common issue in EVPN-VXLAN environments is related to next-hop reachability, especially when accept-remote-nexthop is configured.
* In typical EVPN-VXLAN setups, the next-hop address should be reachable within the overlay network. However, the accept-remote-nexthop can cause issues if the next-hop IP address is not directly reachable or conflicts with the expected behavior in the overlay.
* Corrective Action:
* D. delete protocols bgp group OVERLAY accept-remote-nexthop:Removing this command will ensure that the device uses its own IP address as the next-hop in BGP advertisements, which is standard practice in many EVPN-VXLAN setups. This change should help establish the BGP session with Border-Leaf-2.
Data Center References:
* Proper handling of BGP next-hop attributes is critical in establishing and maintaining stable BGP sessions, especially in complex multi-fabric environments like EVPN-VXLAN. Removing accept- remote-nexthop aligns with best practices in many scenarios.

NEW QUESTION # 28
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?

A. proxy NDP
B. DAD
C. proxy ARP
D. GARP

Answer: C

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 # 29
......

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