[Q19-Q41] Free JN0-683 Questions for Juniper JN0-683 Exam [Nov-2024]

Q19. You are asked to interconnect two of your company’s data centers across an IP backbone. Both data centers require Layer 2 and Layer 3 connectivity. In this scenario, which three actions would accomplish this task?
(Choose three.)

Advertise Type 2 EVPN routes across the DCI.

Ensure border leaf nodes in each data center can exchange EVPN routes.

Ensure there is a full mesh of VTEPs between all spine nodes within both data centers.

Advertise Type 5 EVPN routes across the DCI.

Ensure there is a full mesh of VTEPs between all leaf nodes within data centers.

Q20. Your organization is implementing EVPN-VXLAN and requires multiple overlapping VLAN-IDs. You decide to use a routing-instance type mac-vrf to satisfy this request.
Which two statements are correct in this scenario? (Choose two.)

Host-facing interfaces must be configured using a service-provider style configuration.

Host-facing interfaces must be configured using enterprise-style configuration.

Spine-facing interfaces must be configured using an enterprise-styleconfiguration.

The routing-instance service type can be VLAN-based.

Q21. Exhibit.

Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.
Referring to the exhibit, which two configuration changes are required to solve the problem? (Choose two.)

Configure the setswitch-options route-distinguisher 192.168.100.51:2 parameter on Leaf-1.

Configure the set switch-options service-id 1 parameter on Leaf-2.

Configure the setswitch-options vtep-source-interface100. 0 parameter on Leaf-1.

Configure the set switch-options vrf-target target: 65000:55 parameter on Leaf-2.

Q22. Exhibit.

You are troubleshooting an IP fabric (or your data center. You notice that your traffic is not being load balanced to your spine devices from your leaf devices. Referring to the configuration shown in the exhibit, what must be configured to solve this issue?

The load-balance policy must be applied to the forwarding table under the routing-options hierarchy.

The multipastmultiple -as configuration must be configured for each peer in the BGP spine group.

The load-balance policy must be applied as an export policy to your BGP

The load-balance policy must have a from statement that matches on protocol bgp.

Q23. Which statement is correct about a collapsed fabric EVPN-VXLAN architecture?

Fully meshed back-to-back links are needed between the spine devices.

It supports multiple vendors in the fabric as long as all the spine devices are Juniper devices deployed with L2 VTEPs

Using Virtual Chassis at the leaf layer increases resiliency.

Border gateway functions occur on border leaf devices.

Q24. Whatare two ways in which an EVPN-signaled VXLAN is different from a multicast-signaled VXLAN?
(Choose two.)

An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using IS-IS.

An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using BGP.

An EVPN-signaled VXLAN is less resource intensive.

An EVPN-signaled VXLAN features slower and more complete convergence.

* Multicast-Signaled VXLAN:
* In traditional multicast-signaled VXLAN, VTEPs (VXLAN Tunnel Endpoints) use multicast to flood and learn about remote VTEPs. This method relies on multicast in the underlay network to distribute BUM (Broadcast, Unknown unicast, and Multicast) traffic.
* This approach can be resource-intensive due to the need for multicast group management and increased network traffic, especially in large deployments.
* EVPN-Signaled VXLAN:
* EVPN-signaled VXLAN uses BGP (Border Gateway Protocol) to signal the presence of VTEPs and distribute MAC address information. BGP is used for VTEP autodiscovery and the distribution of endpoint information.
* This method is more efficient because it reduces the reliance on multicast, instead using BGP control-plane signaling to handle VTEP discovery and MAC learning, which reduces the overhead on the network and improves scalability.
* Correct Statements:
* B. An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using BGP:This is correct because EVPN uses BGP for VTEP autodiscovery, making it more efficient and scalable compared to multicast-based methods.
* C. An EVPN-signaled VXLAN is less resource-intensive:This is correct because it eliminates the need for multicast flooding in the underlay, instead using BGP for signaling, which is less demanding on network resources.
* Incorrect Statements:
* A. An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using IS-IS:This is incorrect because EVPN relies on BGP, not IS-IS, for VTEP discovery and signaling.
* D. An EVPN-signaled VXLAN features slower and more complete convergence:This is incorrect; EVPN with BGP typically provides faster convergence due to its use of a control plane rather than relying on data plane learning.
Data Center References:
* EVPN-VXLAN is widely adopted in modern data center designs due to its scalability, efficiency, and reduced resource consumption compared to multicast-based VXLAN solutions. It leverages the strengths of BGP for control-plane-driven operations, resulting in more efficient and scalable networks.

Q25. Exhibit.

You want to enable the border leaf device to send Type 5 routes of local networks to the border leaf device in another data center. What must be changed to the configuration shown in the exhibit to satisfy this requirement?

Move vrf-target target: 65000:1 to the evpn hierarchy.

Add a VLAN configuration with an 13-interface to the tenant1 routing instance.

Add encapsulation vxlan to the evpn hierarchy.

Change: 5001 in the route-distinguisher to : 10010.

Q26. Exhibit.

A VXLAN tunnel has been created between leaf1and Ieaf2 in your data center. Referring to the exhibit, which statement is correct?

Traffic sent from server1to server2 will be dropped on Ieaf2.

Traffic sent from server1to server2 will be tagged with VLAN ID 100 on Ieaf2 and forwarded to server2.

Traffic sent from server1to server2 will be tagged with VLAN ID 200 on Ieaf2 and forwarded to server2.

Traffic sent from server1to server2 will be dropped on leaf1.

* Understanding VXLAN Tunneling:
* VXLAN (Virtual Extensible LAN) is a network virtualization technology that addresses the scalability issues associated with traditional VLANs. VXLAN encapsulates Ethernet frames in UDP, allowing Layer 2 connectivity to extend across Layer 3 networks.
* Each VXLAN network is identified by a unique VXLAN Network Identifier (VNI). In this exhibit, we have two VNIs, 5100 and 5200, assigned to the VXLAN tunnels between leaf1 and leaf2.
* Network Setup Details:
* Leaf1:Connected to Server1 with VLAN ID 100 and associated with VNI 5100.
* Leaf2:Connected to Server2 with VLAN ID 200 and associated with VNI 5200.
* Spine:Acts as the interconnect between leaf switches.
* Traffic Flow Analysis:
* When traffic is sent from Server1 to Server2, it is initially tagged with VLAN ID 100 on leaf1.
* The traffic is encapsulated into a VXLAN packet with VNI 5100 on leaf1.
* The packet is then sent across the network (via the spine) to leaf2.
* On leaf2, the VXLAN header is removed, and the original Ethernet frame is decapsulated.
* Leaf2 will then associate this traffic with VLAN ID 200 before forwarding it to Server2.
* Correct Interpretation of the Exhibit:
* The traffic originating from Server1, which is tagged with VLAN ID 100, will be encapsulated into VXLAN and transmitted to leaf2.
* Upon arrival at leaf2, it will be decapsulated, and since it is associated with VNI 5200 on leaf2, the traffic will be retagged with VLAN ID 200.
* Therefore, the traffic will reach Server2 tagged with VLAN ID 200, which matches the network configuration shown in the exhibit.
* Data Center References:
* This configuration is typical in data centers using VXLAN for network virtualization. It allows isolated Layer 2 segments (VLANs) to be stretched across Layer 3 boundaries while maintaining distinct VLAN IDs at each site.
* This approach is efficient for scaling large data center networks while avoiding VLAN ID exhaustion and enabling easier segmentation.
In summary, the correct behavior, as per the exhibit and the detailed explanation, is that traffic sent from Server1 will be tagged with VLAN ID 200 when it reaches Server2 via leaf2. This ensures proper traffic segmentation and handling across the VXLAN-enabled data center network.

Q27. 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?

set protocols bgp group overlay export loopbacks

delete protocols bgp group UNDERLAY advertise-external

set protocols bgp group PROVIDER export LOOPBACKS

delete protocols bgp group OVERLAY accept-remote-nexthop

Q28. Exhibit.

Referring to the exhibit, the spinel device has an underlay BGP group that is configured to peer with its neighbors’ directly connected interfaces. Which two statements are true in this scenario? (Choose two.)

The multihop statement is not required to establish the underlay BGP sessions.

Load balancing for the underlay is not configured correctly.

The multihop statement is required to establish the underlay BGP sessions.

Load balancing for the underlay is configured correctly.

Q29. You are selling up an EVPN-VXLAN architecture (or your new data center. thisinitial deployment will be less than 50 switches: however, it could scale up to 250 switches over time supporting 1024 VLANs. You are still deciding whether to use symmetric or asymmetric routing.
In this scenario, which two statements are correct? (Choose two.)

Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance.

Asymmetric routing is easier lo monitor because of the transit VNI.

Symmetric routing supports higher scaling numbers.

Asymmetric routing routes traffic on the egress switch.

Q30. 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.)

The inner packet fields are not used in the hash for load balancing.

The destination port in the UDP header is used to load balance VXLAN traffic.

The source port in the UDP header is used to load balance VXLAN traffic.

The inner packet fields are used in the hash for load balancing.

Q31. You are deploying multiple Juniper switches al the same location. Your switches are currently using the factory-default configuration.
In this scenario, which two statements are correct? (Choose two.)

The DHCP server configuration cannot provide Junos version requirements to DHCP clients.

The switch will try to request an IP address from a DHCP server using all interfaces that are connected and are operational.

The switch will try to request an IP address from a DHCP server using only the management interface.

The DHCP server configuration can provide Junos version requirements to DHCP clients.

Q32. You want to provide a OCI that keeps each data center routing domain isolated, while also supporting translation of VNIs. Which DCI scheme allows these features?

MPLS DCI label exchange

over the top (OTT) with VNI translation enabled

VXLAN stitching

over the top (OTT) with proxy gateways

Q33. You are asked to deploy 100 QFX Series devices using ZTP Each OFX5120 requires a different configuration. In this scenario, what are two components that you would configure on the DHCP server?
(Choose two.)

the IP address of the FTP server

the MAC address for each OFX5120

the MAC address of the FTP server

the management IP address for each OFX5120

Q34. 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?

The EVPN route for this host does not have a valid next hop.

The ARP lookup for this host has failed.

The host for this entry is locally connected to leaf1.

This entry is associated with a multicast EVPN route.

Q35. Exhibit.

Referring to the configuration shown in the exhibit, assume that there is no external router present, and that the configuration is fabric-only.
Which two statements are true about the example configuration? (Choose two.)

VNI 10006is assigned to vlan 800 (irb.800).

Devices in irb.400 (vlan 400) are not able to communicate directly with devices in routing instance Customer A.

Devices in routing instance Customer A are able to communicate with devices in routing instance Customer B

Devices in irb.400 (vlan 400) and irb.800 (vlan 800) are able to communicate over the fabric.

Q36. You are adding a server lo a tenant’s network within your data center and must limit access to a specific traffic type within the tenant network without pushing all tenant traffic through a firewall.
What will satisfy this requirement?

Use route leaking with EVPN and a routing policy.

Use filter-based forwarding.

Put the new server on a unique subnet within the tenant’s network.

Use a static route in the tenant VRF with a firewall as the next hop for traffic to the new server.

Q37. As part of the onboarding process for new switches being added to your data centers, your company uses Juniper Networks’ ZTP process. As part of the ZTP process, a script is executed by the devices being onboarded.
Which statement is correct in this scenario?

The Junos ZTP process supports Shell. JScript. and Ansible.

The Junos ZTP process supports Python, SLAX, and Perl.

The Junos ZTP process supports JScript. Ansible. and Perl.

The Junos ZTP process supports Shell. Python, and SLAX.

Q38. You are asked to configure telemetry on the OFX Series devices in your data center fabric. You want to use sensors that have a vendor-neutral data model Which type of sensor should you use in this scenario?

JTI OpenConfig sensors

JTI native sensors

Python sensors

analog sensors

Q39. You are asked for TX and RX traffic statistics for each interface to which an application server is attached.
The statistics need to be reported every five seconds. Using the Junos default settings, which telemetry method would accomplish this request?

gNMI

SNMP

Native Sensors

OpenConfig

Q40. Which three statements are correct about symmetric IRB routing with EVPN Type 2 routes? (Choose three.)

An L3 interface (IRB) is required for each local VLAN.

Symmetric routing requires MAC-VRF.

Symmetric routing supports the EVPN service VLAN bundle.

Symmetric routing requires an extra transit VNI for each VRF.

Symmetric routing is less efficient than asymmetric routing.

Q41. Exhibit.

Given the configuration shown in the exhibit, why has the next hop remained the same for the EVPN routes advertised to the peer 203.0.113.2?