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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	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 4	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 5	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.

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q47-Q52):

NEW QUESTION # 47
Exhibit.

Referring to the exhibit, why is the active source field blank for the entry that uses the 00:0c:29:e8:b7:39 MAC address?

A. This entry is associated with a multicast EVPN route.
B. The host for this entry is locally connected to leaf1.
C. The ARP lookup for this host has failed.
D. The EVPN route for this host does not have a valid next hop.

Answer: B

NEW QUESTION # 48
What are three actions available tor MAC move limiting? (Choose three.)

A. log
B. drop
C. enable
D. shutdown
E. filter

Answer: A,B,D

Explanation:
* MAC Move Limiting:
* MAC move limiting is a security feature used in network switches to detect and mitigate rapid changes in MAC address locations, which could indicate a network issue or an attack such as MAC flapping or spoofing.
* When a MAC address is learned on a different interface than it was previously learned, the switch can take various actions to prevent potential issues.
* Available Actions:
* A. drop:This action drops packets from the MAC address if it violates the move limit, effectively blocking communication from the offending MAC address.
* D. log:This action logs the MAC move event without disrupting traffic, allowing network administrators to monitor and investigate the event.
* E. shutdown:This action shuts down the interface on which the MAC address violation occurred, effectively stopping all traffic on that interface to prevent further issues.
* Other Actions (Not Correct):
* B. filter:Filtering is not typically associated with MAC move limiting; it generally refers to applying ACLs or other mechanisms to filter traffic.
* C. enable:This is not an action related to MAC move limiting, as it does not represent a specific reaction to a MAC move event.
Data Center References:
* MAC move limiting is crucial for maintaining network stability and security, particularly in environments with dynamic or large-scale Layer 2 networks where MAC addresses might frequently change locations.

NEW QUESTION # 49
Which two statements are true about a pure IP fabric? (Choose two.)

A. An IP fabric supports Layer 2 VLANs.
B. An IP fabric does not support Layer 2 protocols.
C. Devices in an IP fabric must be connected to a fabric controller.
D. Devices in an IP fabric function as Layer 3 routers.

Answer: B,D

Explanation:
* Understanding Pure IP Fabric:
* A pure IP fabric is a network design where all devices operate at Layer 3, meaning that each device in the fabric is a router that makes forwarding decisions based on IP addresses.
* Layer 2 Support:
* In a pure IP fabric, traditional Layer 2 protocols such as Spanning Tree Protocol (STP) or VLANs are not supported. Instead, the network relies entirely on Layer 3 routing protocols to manage traffic between devices.
* Routing Functionality:
* Since devices in an IP fabric operate as Layer 3 routers, they handle IP routing and provide network services based on IP addresses, not on MAC addresses or Layer 2 switching.
Conclusion:
* Option A:Correct-Devices in an IP fabric function as Layer 3 routers.
* Option D:Correct-A pure IP fabric does not support traditional Layer 2 protocols, making it a purely routed environment.

NEW QUESTION # 50
You are deploying an IP fabric using EBGP and notice that your leaf devices areadvertising and receiving all the routes. However, the routes are not installed in the routing table and are marked as hidden.
Which two statements describe how to solve the issue? (Choose two.)

A. You need to configure as-override.
B. You need to configure a next-hop self policy.
C. You need to configure multipath multiple-as.
D. You need to configure loops 2.

Answer: B,C

Explanation:
* Issue Overview:
* The leaf devices in an IP fabric using eBGP are advertising and receiving all routes, but the routes are not being installed in the routing table and are marked as hidden. Thistypically indicates an issue with the BGP configuration, particularly with next-hop handling or AS path concerns.
* Corrective Actions:
* B. You need to configure a next-hop self policy:This action ensures that the leaf devices modify the next-hop attribute to their own IP address before advertising routes to their peers. This is particularly important in eBGP setups where the next-hop may not be directly reachable by other peers.
* D. You need to configure multipath multiple-as:This setting allows the router to accept multiple paths from different autonomous systems (ASes) and use them for load balancing.
Without this, the BGP process might consider only one path and mark others as hidden.
* Incorrect Statements:
* A. You need to configure as-override:AS-override is used to replace the AS number in the AS- path attribute to prevent loop detection issues in MPLS VPNs, not in a typical eBGP IP fabric setup.
* C. You need to configure loops 2:There is no specific BGP command loops 2 relevant to resolving hidden routes in this context. It might be confused with allowas-in, which is used to allow AS path loops under certain conditions.
Data Center References:
* Proper BGP configuration is crucial in IP fabrics to ensure route propagation and to prevent routes from being marked as hidden. Configuration parameters like next-hop self and multipath multiple-as are common solutions to ensure optimal route installation and load balancing in a multi-vendor environment.

NEW QUESTION # 51
You want to convert an MX Series router from a VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway for VNI 100. You have already configured an IRB interface. In this scenario, which command would you use to accomplish this task?

A. set protocols isis interface irb.100 passive
B. set vlans VLAN-100 13-interface irb.100
C. set protocols ospf area 0.0.0.0 interface irb.100 passive
D. set bridge-domains VLAN-100 routing-interface irb.100

Answer: D

Explanation:
* Scenario Overview:
* Converting an MX Series router from a VXLAN Layer 2 gateway to a VXLAN Layer 3 gateway involves transitioning the router's functionality from simply bridging traffic within a VXLAN segment to routing traffic between different segments.
* Key Configuration Requirement:
* IRB (Integrated Routing and Bridging) Interface:An IRB interface allows for both Layer 2 switching and Layer 3 routing. To enable routing for a specific VNI (VXLAN Network Identifier), the IRB interface must be associated with the routing function in the corresponding bridge domain.
* Correct Command:
* C. set bridge-domains VLAN-100 routing-interface irb.100:This command correctly binds the IRB interface to the bridge domain, enabling Layer 3 routing functionality within the VXLAN for VNI 100. This effectively transitions the device from operating solely as a Layer 2 gateway to a Layer 3 gateway.
Data Center References:
* This configuration step is essential when converting a Layer 2 VXLAN gateway to a Layer 3 gateway, enabling the MX Series router to route between VXLAN segments.

NEW QUESTION # 52
......

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JN0-683 Trustworthy Exam Content, Test JN0-683 Guide

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q47-Q52):

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