[Feb 18, 2025] Get to the Top with JN0-683 Practice Exam Questions [Q34-Q51]

NO.34 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.)

You need to configure as-override.

You need to configure a next-hop self policy.

You need to configure loops 2.

You need to configure multipath multiple-as.

NO.35 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.

NO.36 Which two statements are true about EVPN routes for Data Center Interconnect? (Choose two.)

Type 5 EVPN routes require a VXLAN tunnel to the protocol next hop.

Type 2 EVPN routes do not require a VXLAN tunnel to the protocol next hop.

Type 2 EVPN routes require a VXLAN tunnel to the protocol next hop.

Type 5 EVPN routes do not require a VXLAN tunnel to the protocol next hop.

NO.37 Exhibit.

Referring to the exhibit, which statement Is true?

A PBB-EVPN architecture is being used.

An ERB architecture is being used.

An OTT architecture is being used.

A CRB architecture is being used.

NO.38 Exhibit.

Referring to the exhibit, Host1 (10.1.1.1) is failing to communicate with Host2 (10.1.2.1) in a data center that uses an ERB architecture. What do you determine from the output?

The traffic is failing because load balancing is not configured correctly.

The traffic is entering the VXLAN tunnel.

Host1 and Host2 are directly connected to leaf1.

The irb.20 interface is not configured on leaf1.

NO.39 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 management IP address for each OFX5120

the MAC address for each OFX5120

the IP address of the FTP server

the MAC address of the FTP server

NO.40 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.

NO.41 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.

NO.42 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.

NO.43 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 vtep-source-interface irb.0parameter on Leaf-1.

Configure the set switch-options vrf-target target:65000:l parameteron Leaf-2.

Configure the setswitch-options route-distinguisher i92.168.100.50:i parameter on Leaf-1.

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

NO.44 You are deploying a Clos IP fabric with an oversubscription ratio of 3:1.
In this scenario, which two statements are correct? (Choose two.)

The oversubscription ratio remains the same when you remove spine devices.

The oversubscription ratio decreases when you add spine devices.

The oversubscription ratio increases when you remove spine devices.

The oversubscription ratio remains the same when you add spine devices.

NO.45 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

NO.46 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?

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

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.

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.

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.

NO.47 Exhibit.

Referring to the exhibit, when Host A sends an ARP request for Host B’s IP address, which Junos feature does leaf1require to send an ARP response back to Host A without having to send a broadcast frame over the fabric?

proxy ARP

proxy NDP

GARP

DAD

NO.48 Which two statements are true about IP fabrics using unnumbered BGP? (Choose two.)

Unnumbered BGP requires that family inet6is configured on each interface.

Unnumbered BGP peering automatically provisions IPv6 peering.

Unnumbered BGP requires that family inet is configured on each interface.

Unnumbered BGP peering automatically provisions IPv4 peering.

NO.49 You are designing an IP fabric tor a large data center, and you are concerned about growth and scalability.
Which two actions would you take to address these concerns? (Choose two.)

Design a five-stage Clos IP fabric.

Design a three-stage Clos IP fabric.

Use EX4300 Series devices as the spine devices.

Use OFX5700 Series devices as the super spines.

NO.50 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

NO.51 Exhibit.

Referring tothe exhibit, which statement is correct?