Pass JNCIS-DC JN0-481 exam [Dec 18, 2025] Updated 78 Questions [Q21-Q42]

Pass JNCIS-DC JN0-481 exam [Dec 18, 2025] Updated 78 Questions

Juniper JN0-481 Actual Questions and 100% Cover Real Exam Questions

NEW QUESTION # 21
Multilenancy for applications is achieved by creating virtual networks (VNs) within which construct?

A. connectivity template
B. routing zone
C. security policy
D. routing table

Answer: B

NEW QUESTION # 22
You want to keep virtual networks isolated from each other within the Juniper Apstra system. In this scenario, what are three ways to accomplish this task? (Choose three.)

A. Disable IPv4 connectivity when creating the virtual network within the same Routing Zone.
B. Disable Route Target exports when creating the Routing Zones.
C. Enable Security Policy for virtual networks in the same Routing Zone.
D. Use Connectivity Templates to block access within the same Routing Zone.
E. Put each network in different Routing Zones.

Answer: C,D,E

Explanation:
To keep virtual networks isolated from each other within the Juniper Apstra system, you can use one or more of the following methods:
Enable Security Policy for virtual networks in the same Routing Zone. This allows you to define rules that control the traffic flow between different virtual networks within the same routing zone.
You can specify the source and destination virtual networks, the protocol, the port, and the action (allow or deny) for each rule. The security policy is applied on the ingress interface of the leaf devices.
Use Connectivity Templates to block access within the same Routing Zone. This allows you to customize the connectivity between different racks within the same routing zone. You can create templates that define the link type, the routing protocol, and the access control list (ACL) for each rack pair. The ACL can be used to filter the traffic based on the source and destination IP addresses, the protocol, and the port.
Put each network in different Routing Zones. This allows you to create logical boundaries between different virtual networks based on the route target (RT) values. A routing zone is a collection of virtual networks that share the same RT for importing and exporting routes. Virtual networks in different routing zones do not exchange routes with each other, unless you configure remote EVPN gateways to connect them.

NEW QUESTION # 23
What is the function of the Revert button in the Juniper Apstra Ul?

A. The Revert button performs a rollback 0 on Juniper devices in the fabric.
B. The Revert button will undo the last change made to the configuration.
C. The Revert button deletes any uncommitted changes within Apstra.
D. The Revert button will rollback to the previous configuration of a specified device.

Answer: C

Explanation:
The Revert button is located on the Uncommitted tab of the blueprint page. The Uncommitted tab shows the changes that have been staged but not yet committed to the network. The Revert button allows you to discard any uncommitted changes and revert to the last committed state of the blueprint. This is useful if you want to cancel the changes that you have made or if you want to start over with a fresh slate.

NEW QUESTION # 24
In Juniper Apstra, which statement is correct?

A. VMware anomaly detection requires a VMware hypervisor with exports enabled.
B. VMware anomaly detection is on by default.
C. VMware anomaly detection requires a vCenter server configured under External Systems
D. VMware anomaly detection requires an Apstra server running on VMware.

Answer: C

Explanation:
VMware anomaly detection is a feature of Apstra that provides visibility and validation of the virtual network settings and the physical network settings in a VMware vSphere environment. To enable this feature, Apstra requires a connection to a vCenter server that manages the ESX/ESXi hosts and the VMs connected to the Apstra-managed leaf switches. The vCenter server must be configured under External Systems in the Apstra web interface, and the vCenter integration must be staged and committed in the blueprint. This allows Apstra to collect information about VMs, ESX/ESXi hosts, port groups, and VDS, and to flag any inconsistencies or mismatches that might affect VM connectivity.

NEW QUESTION # 25
Which two statements are correct about Time Voyager? {Choose two.)

A. Time Voyager retains the last ten blueprint commits.
B. Time Voyager retains up to twenty-five saved revisions.
C. Time Voyager retains the five most recent blueprint commits.
D. Time Voyager retains all of the blueprint revisions from the last Juniper Apstra backup.

Answer: B,C

Explanation:
Time Voyager is a feature of Juniper Apstra that allows you to restore previous revisions of a blueprint, which is a logical representation of your network design and configuration. Time Voyager automatically saves the five most recent blueprint commits, which are the changes that you apply to the network. You can also manually save up to twenty-five revisions by keeping them, which prevents them from being overwritten by new commits.

NEW QUESTION # 26
You use Juniper Apstra to enable a new VXLAN virtual network. Which two components would be automatically derived in this situation? (Choose two.)

A. VLAN-ID
B. Route Zone
C. IP subnet
D. VXLAN VNI

Answer: C,D

Explanation:
A VXLAN virtual network is a collection of Layer 2 forwarding domains that span multiple racks in a fabric. A VXLAN virtual network requires a name and a VXLAN network identifier (VNI), which is a 24-bit number that identifies the virtual network. The VNI can be either explicitly assigned or auto-assigned from a resource pool. A VXLAN virtual network can also have Layer 3 connectivity, which enables routing between different VNIs within a routing zone. A routing zone is an L3 domain that isolates the IP traffic of different tenants. A routing zone can have one or more VNIs associated with it. To enable Layer 3 connectivity, a VXLAN virtual network needs an IP subnet, which is a range of IP addresses that can be assigned to the hosts in the virtual network. The IP subnet can be either explicitly assigned or auto-assigned from a resource pool. Therefore, the correct answer is A and C. IP subnet and VXLAN VNI are two components that would be automatically derived when enabling a new VXLAN virtual network using Juniper Apstra.

NEW QUESTION # 27
Which two statements about VXLAN VNIs are correct? (Choose two.)

A. VNIs identify a collision domain.
B. VNIs can have over 16 million unique values.
C. VNIs are alphanumeric values.
D. VNIs identify a broadcast domain

Answer: B,D

Explanation:
VXLAN VNIs are virtual network identifiers that are used to identify and isolate Layer 2 segments in the overlay network. VXLAN VNIs have the following characteristics:
VNIs can have over 16 million unique values. This is because VXLAN VNIs are 24-bit fields that can range from 4096 to 16777214, according to the VXLAN standard. This allows VXLAN to support a large number of Layer 2 segments and tenants in the network. VNIs identify a broadcast domain. This is because VXLAN VNIs are used to group the end hosts that belong to the same Layer 2 segment and can communicate with each other using VXLAN tunnels. The VXLAN tunnels are established using the VTEP information that is distributed by EVPN. The VTEPs are VXLAN tunnel endpoints that perform the VXLAN encapsulation and decapsulation.
The VXLAN tunnels preserve the Layer 2 semantics and support the broadcast, unknown unicast, and multicast traffic within the same VNI.

NEW QUESTION # 28
You have a virtual network that needs controlled access to other virtual networks in the same routing zone. Using the Juniper Apstra Ul. which feature would be used to accomplish this task?

A. security policy
B. anti-affinity policy
C. interface policy
D. routing policy

Answer: A

Explanation:
A security policy is the feature that would be used to accomplish the task of controlling access to other virtual networks in the same routing zone using the Juniper Apstra UI. A security policy allows you to define rules that specify which traffic is allowed or denied between different virtual networks, IP endpoints, or routing zones. A security policy can be applied to one or more virtual networks in the same routing zone, and it can use various criteria to match the traffic, such as source and destination IP addresses, protocols, ports, or tags. A security policy can also support DHCP relay, which enables the forwarding of DHCP requests from one virtual network to another.

NEW QUESTION # 29
In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Lead and Leat6 using the same virtual network identifier (VNI). Which two statements are correct in this scenario? (Choose two.)

A. Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices.
B. The underlay must use IRB interfaces.
C. The underlay must be provisioned with PIMv2.
D. The underlay EBGP peering's must be established between leaf and spine devices.

Answer: A,D

Explanation:
In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Leaf1 and Leaf6 using the same virtual network identifier (VNI). This means that the servers belong to the same Layer 2 domain and can communicate with each other using VXLAN tunnels across the fabric. The underlay network provides the IP connectivity between the leaf and spine devices, and it uses EBGP as the routing protocol. Therefore, the following two statements are correct in this scenario:
Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices. This is because the loopback addresses are used as the source and destination IP addresses for the VXLAN tunnels, and they must be reachable by all the devices in the fabric.
The loopback addresses are also used as the router IDs and the BGP peer addresses for the EBGP sessions.
The underlay EBGP peering's must be established between leaf and spine devices. This is because the EBGP sessions are used to exchange the underlay routing information and the EVPN routes for the overlay network. The EBGP sessions are established using the loopback addresses of the devices, and they follow a spine-and-leaf topology, where each leaf device peers with all the spine devices, and each spine device peers with all the leaf devices.

NEW QUESTION # 30
You have recently committed a change after creating a new blueprint in Juniper Apstra. In the main dashboard, you see a number of anomalies related to BGR What is a likely cause of these anomalies?

A. Spine-leaf links are incorrectly set.
B. The fabric has not converged yet.
C. A generic system has not been configured.
D. You have misconfigured ASNs.

Answer: B

Explanation:
In Juniper Apstra, a blueprint is a logical representation of the network design and configuration.
When you create a new blueprint, you need to commit the changes to apply them to the network devices. However, committing the changes does not mean that the network is immediately updated and operational. It may take some time for the network to converge and reflect the new state of the blueprint. During this time, you may see some anomalies related to BGP in the main dashboard, which indicate that the BGP sessions are not established or stable between the devices. These anomalies are usually temporary and will disappear once the network converges and the BGP sessions are up and running.

NEW QUESTION # 31
What are two system-defined user roles that are available in Juniper Apstra? (Choose two.)

A. viewer
B. authorized
C. root
D. user

Answer: A,D

Explanation:
Juniper Apstra provides four system-defined user roles that are available in the Apstra GUI environment. They are: administrator, device_ztp, viewer, and user. Based on the web search results, we can infer the following statements:
viewer: This role includes permissions to only view various elements in the Apstra system, such as blueprints, devices, design, resources, external systems, platform, and others. Users with this role cannot create, edit, or delete any element.
user: This role includes permissions to view and edit various elements in the Apstra system, such as blueprints, devices, design, resources, external systems, platform, and others. Users with this role cannot create or delete any element.
authorized: This is not a system-defined user role in Juniper Apstra. It is a term used to describe users who have been authenticated by an external system, such as LDAP, Active Directory, TACACS+, or RADIUS.
root: This is not a system-defined user role in Juniper Apstra. It is a term used to describe the superuser account on a Linux system, which has full access to all commands and files. Creating a user in the Apstra GUI does not provide that user access to the Apstra platform via SSH. To access the Apstra platform via SSH, you must create a local Linux system user.

NEW QUESTION # 32
Within Managed Devices in the Juniper Apstra Ul, you notice that several devices have the OOS- Quarantined status. The devices cannot be added to any blueprint. Which action would solve this problem?

A. Acknowledge the device.
B. Install the agent, even though connectivity is established.
C. Upload a new pristine configuration.
D. Fix the hardware issues with the quarantined devices.

Answer: A

Explanation:
When an agent installation is successful, devices are placed into the Out of Service Quarantined (OOS-QUARANTINED) state using the Juniper Apstra UI. This state means that the device is not yet managed by Apstra and has not been assigned to any blueprint. The device configuration at this point is called Pristine Config. To make the device ready for use in a blueprint, you need to acknowledge the device, which is a manual action that confirms the device identity and ownership. Acknowledging the device changes its status to Out of Service Ready (OOS- READY).

NEW QUESTION # 33
Multilenancy for applications is achieved by creating virtual networks (VNs) within which construct?

A. connectivity template
B. routing zone
C. security policy
D. routing table

Answer: B

NEW QUESTION # 34
You are receiving cable, interface, and BGP anomalies from several devices within the data center fabric. In Juniper Apstra, how would you troubleshoot these types of errors?

A. In the Ul, go to Devices and confirm that agent connectivity is fine.
B. In the Ul, access the console to the devices and review the interface states.
C. In the Ul, go to Time Voyager and revert to the last working version.
D. In the Ul, verify device connectivity by consulting the cable map.

Answer: D

Explanation:
The cable map is a graphical representation of the physical connections between the devices in the data center fabric. It shows the status of the cables, interfaces, and BGP sessions for each device. You can use the cable map to identify and troubleshoot any cable, interface, or BGP anomalies that may occur in the fabric. You can also filter the cable map by device name, device type, device role, device state, cable state, interface state, or BGP state.

NEW QUESTION # 35
Using Juniper Apstra. which component is defined in a template?

A. the leaf-to-spine interconnection
B. the definition of IP pools
C. the speed of the links between the spine devices and the leaf devices
D. the number of spine devices in a topology

Answer: A

Explanation:
A template is a configuration template that defines a network's policy intent and structure. A template can be either rack-based or pod-based, depending on the type and number of racks and pods in the network design. A template includes the following details:
Policies: These are the parameters that apply to the entire network, such as the overlay control protocol, the ASN allocation scheme, and the underlay type.
Structure: This is the physical layout of the network, such as the type and number of racks, pods, spines, and leaves. The structure also defines the leaf-to-spine interconnection, which is the number and type of links between the leaf and spine devices. The leaf-to-spine interconnection can be either single or dual, depending on the redundancy and bandwidth requirements.
Therefore, the correct answer is A. the leaf-to-spine interconnection. This is a component that is defined in a template, as it determines the physical connectivity of the network. The speed of the links, the number of spine devices, and the definition of IP pools are not components that are defined in a template, as they are either derived from the device profiles, the resource pools, or the blueprint settings.

NEW QUESTION # 36
Referring to the exhibit, how many broadcast domains will an Ethernet frame pass through when traversing the IP fabric from Server A to Server B?

A. 0
B. 1
C. 2
D. 3

Answer: D

Explanation:
Referring to the exhibit, the image shows a simplified diagram of an IP fabric network connecting two servers, labeled as Server A and Server B. The IP fabric is a network architecture that uses a Clos topology to provide high bandwidth, low latency, and scalability for data center networks.
The IP fabric consists of spine and leaf devices that use BGP as the routing protocol and VXLAN as the overlay technology.
A broadcast domain is a logical portion of a network where any device can directly transmit broadcast frames to other devices at the data link layer (OSI Layer 2). A broadcast frame is a frame that has a destination MAC address of all ones (FF:FF:FF:FF:FF:FF), which means that it is intended for all devices in the same broadcast domain. A broadcast domain is usually bounded by a router, which does not forward broadcast frames to other networks.
In the exhibit, there are two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. The first broadcast domain is the one that contains Server A and the leaf device that it is connected to. The second broadcast domain is the one that contains Server B and the leaf device that it is connected to. The IP fabric itself is not a broadcast domain, because it uses IP routing and VXLAN encapsulation to transport the Ethernet frames over the Layer 3 network.

NEW QUESTION # 37
Which statement is correct about the Juniper Apstra Rendered configuration?

A. It is dynamically tendered at commit time.
B. It is built at commit time and stored in a MySQL database.
C. It is rendered from the graph database and stored locally.
D. It is stored in a NoSQL database and incrementally updated.

Answer: A

Explanation:
The Juniper Apstra Rendered configuration is the configuration that is generated from the staged blueprint and applied to the devices in the network. The Rendered configuration is dynamically rendered at commit time, which means that it is created on the fly based on the latest changes and validations in the blueprint. The Rendered configuration is not stored in any database, but it can be viewed in the Apstra UI or downloaded as a file. The Rendered configuration reflects the desired state of the network as defined by the intent of the blueprint.

NEW QUESTION # 38
What is the purpose of an interface map in Juniper Apstra?

A. An interface map specifies a connection between the interfaces of two devices.
B. An interface map specifies the number of ports and the port speeds of a logical device
C. An interface map associates a logical device with a device profile.
D. An interface map specifies the connections between racks in a template.

Answer: A

Explanation:
An interface map is a configuration template that maps interfaces between logical devices and physical hardware devices (represented with device profiles) while adhering to vendor specifications. An interface map specifies a connection between the interfaces of two devices, such as a leaf and a spine, a leaf and a server, or a leaf and an external gateway. An interface map can also specify port transformations, such as breaking out a 40 GbE port into four 10 GbE ports, or disabling unused ports. An interface map can be used to achieve the intended network configuration rendering and to enable features such as LAG, ESI-LAG, or MLAG.

NEW QUESTION # 39
In the Juniper Apstra Ul. You are creating a VNI pool for virtual networks.
In this scenario, which VNI range is acceptable?

A. The valid VNI range is 1 through 10000.
B. Any range is acceptable for the VNI pool.
C. The valid VNI range is 2 through 4096.
D. The valid VNI range is 4096 through 16777214.

Answer: D

Explanation:
In the Juniper Apstra UI, you can create VNI pools for virtual networks that use VXLAN encapsulation in the overlay network. A VNI pool is a resource pool that contains a range of VNIs that can be assigned to the virtual networks. The valid VNI range for a VNI pool is 4096 through
16777214, according to the VXLAN standard. Therefore, the statement B is correct in this scenario. The following three statements are incorrect in this scenario:
Any range is acceptable for the VNI pool. This is not true, because the VNI range has a lower and upper limit defined by the VXLAN standard. The lower limit is 4096, and the upper limit is
16777214. Any VNI outside this range is invalid and cannot be used for VXLAN encapsulation.
The valid VNI range is 2 through 4096. This is not true, because the VNI range does not start from 2, but from 4096. The VNIs from 2 to 4095 are reserved and cannot be used for VXLAN encapsulation. The valid VNI range is 1 through 10000. This is not true, because the VNI range does not include 1, which is also reserved and cannot be used for VXLAN encapsulation. The VNI range also does not end at 10000, but at 16777214, which is the maximum possible value for a 24-bit VNI field.

NEW QUESTION # 40
Using the Juniper Apstra multitenancy capabilities, which approach will allow a tenant to interconnect two different routing zones?

A. Use interconnection through an external gateway.
B. Interconnection is the default behavior.
C. Interconnection cannot be enabled.
D. Use interconnection through the fabric spine nodes.

Answer: A

Explanation:
A routing zone is an L3 domain, the unit of tenancy in multi-tenant networks. You create routing zones for tenants to isolate their IP traffic from one another, thus enabling tenants to re-use IP subnets. In addition to being in its own VRF, each routing zone can be assigned its own DHCP relay server and external system connections. You can create one or more virtual networks within a routing zone, which means a tenant can stretch its L2 applications across multiple racks within its routing zone. For virtual networks with Layer 3 SVI, the SVI is associated with a Virtual Routing and Forwarding (VRF) instance for each routing zone isolating the virtual network SVI from other virtual network SVIs in other routing zones. If you're using multiple routing zones, external system connections must be from leaf switches in the fabric. Routing between routing zones must be accomplished with external systems.

NEW QUESTION # 41
In the Juniper Apstra Ul, which three resources are assigned under the Resources menu?
(Choose three.)

A. ASN pools
B. VNI pools
C. IP address pools
D. logical device pools
E. VTEP pools

Answer: A,B,C

Explanation:
In the Juniper Apstra UI, the Resources menu allows you to create and manage global and local resources that are used for various elements of the network design and configuration. The Resources menu includes the following three types of resources that can be assigned to the network devices and virtual networks:
ASN pools: These are pools of autonomous system numbers (ASNs) that are used for the underlay routing protocol (EBGP) between the leaf and spine devices. You can create ASN pools with either 2-byte or 4-byte ASNs, and assign them to the logical devices in the blueprint. VNI pools: These are pools of virtual network identifiers (VNIs) that are used for the overlay network (VXLAN) between the end hosts. You can create VNI pools with a range of VNIs, and assign them to the virtual networks in the blueprint.
IP address pools: These are pools of IPv4 or IPv6 addresses that are used for various purposes in the network, such as the loopback addresses for the devices, the IP prefixes for the virtual networks, the host IP addresses for the end hosts, and the gateway IP addresses for the IRB interfaces. You can create IP address pools with a range of IP addresses, and assign them to the logical devices and virtual networks in the blueprint.
The following two types of resources are not assigned under the Resources menu:
VTEP pools: These are not resources that can be created or assigned by the user. VTEPs are VXLAN tunnel endpoints that are automatically generated by the Apstra server based on the loopback IP addresses of the devices. VTEPs are used as the source and destination IP addresses for the VXLAN tunnels in the overlay network.
Logical device pools: These are not resources that can be created or assigned by the user.
Logical device pools are groups of logical devices that share the same role, interface map, and resource assignments in the blueprint. Logical device pools are used to simplify the network design and configuration by applying the same settings to multiple devices.

NEW QUESTION # 42
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Pass JNCIS-DC JN0-481 exam [Dec 18, 2025] Updated 78 Questions [Q21-Q42]

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