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Juniper JN0-481 Exam Syllabus Topics:
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NEW QUESTION # 17
You are asked to deploy a collapsed fabric architecture. Which two statements are correct about this deployment? (Choose two.)
- A. Leaf devices are full-mesh connected.
- B. Top-of-rack switches provide VXLAN support.
- C. Top-of-rack switches are full-mesh connected.
- D. All EVPN-VXLAN overlay functions are provided by the leaf devices.
Answer: A,D
Explanation:
In Apstra, a collapsed fabric (also described as "spineless") consolidates traditional fabric tiers so that the primary fabric devices perform combined roles. Instead of a dedicated spine tier providing transit between leafs, the fabric is formed by leaf devices connected directly to each other using mesh links. This means a collapsed fabric uses a full-mesh topology at the leaf level, replacing the usual leaf-to-spine connections found in a three-stage Clos. Therefore, the statement that leaf devices are full-mesh connected is correct.
Because the collapsed fabric devices serve the fabric roles, they also provide the EVPN-VXLAN overlay functions (VTEP behavior, EVPN control-plane participation, and VXLAN encapsulation/decapsulation) necessary for tenant segmentation and service delivery. Juniper's collapsed fabric validated designs further describe the collapsed fabric switches as serving all fabric roles (including border-leaf behaviors when external connectivity is required), reinforcing that overlay functions reside on these fabric leaf devices.
The remaining statements are not generally true for the collapsed fabric definition. Top-of-rack (access) switches-when present in certain collapsed designs-are not defined by default as full-mesh connected, and VXLAN support is not a requirement for those TOR/access switches unless the specific architecture explicitly uses them as VTEPs. The defining characteristics are the consolidated fabric roles and the leaf-level full-mesh.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra5.0/apstra-user-guide/topics/concept/templates.html
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/concept/rack-types.html
https://www.juniper.net/documentation/us/en/software/jvd/jvd-collapsed-dc-fabric-with-apstra/jvd-collapsed-dc-fabric-with-apstra.pdf
NEW QUESTION # 18
Referring to the exhibit, what needs to change in the IP fabric to make it a valid IP fabric?
- A. The IP fabric connections must be increased to a speed greater than 10 Gbps.
- B. The connection between the two spine nodes must be removed.
- C. The connection between the two spine nodes must be increased to 40 Gbps.
- D. The IP fabric must consist of only one device model throughout the fabric.
Answer: B
Explanation:
To make the IP fabric a valid IP fabric, the connection between the two spine nodes must be removed. This is because an IP fabric is a network topology that uses a spine-leaf architecture, where the spine devices are only connected to the leaf devices, and the leaf devices are only connected to the spine devices. This creates a non-blocking, high-performance, and scalable network that supports Layer 3 routing protocols such as BGP or OSPF. The connection between the two spine nodes in the exhibit violates the spine-leaf design principle and introduces unnecessary complexity and potential loops in the network.
NEW QUESTION # 19
Which three statements describe intent-based analytics? (Choose three.)
- A. It alerts the network operator when network performance moves away from the baseline.
- B. It is a real-time information processing pipeline.
- C. It indicates when device operating versions require updating.
- D. It collects information from vendor websites.
- E. It is used to establish network performance baselines.
Answer: A,B,E
Explanation:
Intent-based analytics (IBA) is a feature of Juniper Apstra that allows you to combine intent from the network design with current and historic data from devices to reason about the network at- large.
IBA has the following characteristics:
It is a real-time information processing pipeline. This means that IBA can ingest, process, and analyze large amounts of data from devices in real time, using agents and probes.
Agents are software components that collect data from devices and send them to the Apstra server.
Probes are user-defined queries that aggregate data across devices and generate advanced data that can be more easily reasoned about.
It is used to establish network performance baselines. This means that IBA can use the advanced data to measure and monitor the network performance against the expected outcomes and service levels.
IBA can also use the historic data to create baselines that represent the normal behavior and state of the network.
It alerts the network operator when network performance moves away from the baseline. This means that IBA can detect and report any anomalies or deviations from the baseline or the intent in the network.
IBA can also provide insights and recommendations for troubleshooting and resolving the issues.
NEW QUESTION # 20
You have created a blueprint and are in the process of assigning systems. You require the leaf3- sonic device in the blueprint but do not want it to actively participate in the routing of the IP fabric.
In the Juniper Apstra UI, which two modes satisfy this requirement? (Choose two.)
- A. Undeploy
- B. Drain
- C. Ready
- D. Deploy
Answer: B,C
Explanation:
Drain mode keeps the device assigned to the blueprint but prevents it from forwarding or participating in routing, which satisfies the requirement.
Ready mode means the device is assigned and recognized in the blueprint but not yet deployed, so it does not actively participate in fabric routing.
NEW QUESTION # 21
You must enable ECMP load balance in your three-stage EBGP IP Clos fabric.
In this scenario, which two features are required? (Choose two.)
- A. a load-balance policy applied to the BGP group
- B. a load-balance policy applied to the forwarding table
- C. multihopapplied to the BGP group
- D. mutlipath multiple-asapplied to the BGP group
Answer: B,D
Explanation:
A load-balance policy applied to the forwarding table is required to instruct the device to perform ECMP (Equal-Cost Multi-Path) load balancing across multiple next hops in the forwarding plane.
multipath multiple-as applied to the BGP group is necessary when EBGP peers are in different ASNs, as in a typical IP Clos fabric, to allow multiple paths from different ASNs to be installed for ECMP.
NEW QUESTION # 22
You want to assign resources to your blueprint during the deployment phase. In this scenario, which statement is correct?
- A. To assign resources in the blueprint, you must have completed the device profile and device assignments.
- B. All resources are automatically assigned values from the available resource pools.
- C. To assign resources in the blueprint, you must have already created them under global resources.
- D. All resources are created and assigned under the blueprint's Resources tab.
Answer: B
Explanation:
In Apstra 5.1, "resources" (such as ASNs, IP addressing, and VNIs) are allocated to blueprint elements using resource pools. The blueprint does not require you to manually craft every individual resource value; instead, Apstra's workflow is to have you indicate which pool(s) should be used for the blueprint, and then Apstra automatically pulls and assigns the required values. This automation is fundamental to Apstra's intent-based model: once the blueprint knows which pools to consume, it can deterministically allocate unique values across the fabric and generate consistent Junos configuration for the assigned devices.
Option D best matches this behavior because it reflects the documented mechanism: required resources are automatically pulled from the selected pool(s) and assigned in a fast, bulk transaction. This is what enables repeatable deployments-especially in EVPN-VXLAN data center fabrics-because resource collisions and manual tracking are avoided.
Option A is not the defining prerequisite for resource assignment; device profile and device assignment are important overall build steps, but the correctness of resource assignment is tied to pool selection and availability rather than being strictly gated by those tasks. Option B is incorrect because pools can be created and managed beyond only "global" contexts, and Apstra also supports creating additional pools from within the blueprint when needed. Option C is misleading because resources are governed by pools and allocation, not only by manual creation under a single tab.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/resources.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/freeform-resource-management.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/ref/resource-pools-api.html
NEW QUESTION # 23
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. Use Connectivity Templates to block access 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. Put each network in different Routing Zones.
- E. Disable IPv4 connectivity when creating the virtual network within the same Routing Zone.
Answer: A,C,D
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 # 24
You are using Juniper Apstra to create security policies that create ACLs on the fabric devices. What are two valid objects that would be used within Apstra in this scenario? (Choose two.)
- A. Domain name
- B. Routing zone
- C. Virtual network
- D. Application signature
Answer: B,C
Explanation:
In Apstra 5.1, Security Policies express traffic-permit/deny intent between defined fabric endpoints, and Apstra compiles that intent into ACL enforcement on the appropriate switches (for example, on gateway interfaces for east-west segmentation and on border leaf interfaces for north-south controls). The objects you use to define that policy intent must correspond to fabric connectivity constructs that Apstra understands as endpoints in the blueprint's logical model.
Two such valid objects are Virtual Networks and Routing Zones. A virtual network represents a tenant segment (typically mapped into EVPN-VXLAN constructs such as VNI and associated IRB gateway when L3 is enabled). Policies between virtual networks are a common way to implement micro-segmentation or tier-based segmentation (web/app/db) within the same tenant boundary. A routing zone represents the L3 tenancy boundary (mapped to a VRF) and can be used to group and control connectivity at the tenant level, especially where policy needs to be expressed for aggregated tenant domains or for controls involving external connectivity.
"Domain name" and "application signature" are not endpoint objects for Apstra Security Policies in this context. They may exist in other security ecosystems, but Apstra's security intent model for ACL generation is based on topology and blueprint objects (routing zones, virtual networks, and endpoint definitions), which can then be rendered into Junos v24.4 firewall filter-style enforcement on the fabric devices.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/topic-map/policy-security.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/routing-zones.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/virtual-networks.html
NEW QUESTION # 25
You want to assign resources to your blueprint during the deployment phase.
In this scenario, which statement is correct?
- A. To assign resources in the blueprint, you must have completed the device profile and device assignments.
- B. All resources are created and assigned under the blueprint's resources tab.
- C. All resources are automatically assigned values from the available resource pools.
- D. To assign resources in the blueprint, you must have already created them under global resources.
Answer: D
Explanation:
To assign resources to a blueprint in Juniper Apstra, the resources (such as IP pools, ASN pools, VLANs, etc.) must already be created under global resources. Once created, these global resources can then be allocated to the blueprint during the deployment phase.
NEW QUESTION # 26
What are two types of virtual networks defined inside Juniper Apstra software? (Choose two.)
- A. VXLAN
- B. L3 VPN
- C. VLAN
- D. L2 VPN
Answer: A,C
Explanation:
Juniper Apstra supports two primary types of virtual networks within a data center fabric:
VLAN-based virtual networks - Used in simpler Layer 2 designs or collapsed architectures.
VXLAN-based virtual networks - Used in scalable, modern data center fabrics leveraging EVPN- VXLAN overlays for multi-tenant isolation and Layer 2 extension over Layer 3.
NEW QUESTION # 27
You are using Juniper Apstra to create your DC fabric. The fabric requires the use of configlets and requires a property set, which you call "test." While creating the property set, you encounter an error message.
Referring to the exhibit, how would you correct the error?
- A. Remove the trailing blank lines.
- B. Change to JSON and click create.
- C. Use valid YAML syntax of key:value.
- D. Use the Builder option for input type of YAML.
Answer: C
Explanation:
The error message states "Value should be dict", which means the YAML input must be a dictionary format. In YAML, a dictionary is defined using key: value pairs. The input sv_xxh alone is just a string, not a dictionary.
To fix the issue, update the Values field to something like:
sv_xxh: some_value
This will satisfy the required structure for a valid YAML dictionary.
NEW QUESTION # 28
You want to apply a configlet to a specific device using Juniper Apstra. Which two parameters would be used to accomplish this task? (Choose two.)
- A. port group
- B. hostname
- C. form factor
- D. tags
Answer: B,D
Explanation:
To apply a configlet to a specific device using Juniper Apstra, you need to specify the device's hostname and tags. The hostname is the unique identifier of the device in the Apstra system, and the tags are the labels that you can assign to the device to group it with other devices that share the same characteristics. You can use the hostname and tags to filter the devices that you want to apply the configlet to in the blueprint catalog.
NEW QUESTION # 29
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. The fabric has not converged yet.
- B. You have misconfigured ASNs.
- C. A generic system has not been configured.
- D. Spine-leaf links are incorrectly set.
Answer: A
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 # 30
You have an EVPN-VXLAN data center IP fabric, with all single-homed hosts/servers.
Which two EVPN route types are present in this scenario? (Choose two.)
- A. Type 4
- B. Type 3
- C. Type 7
- D. Type 2
Answer: B,D
Explanation:
In an EVPN-VXLAN data center fabric with all single-homed hosts, the following EVPN route types are present:
- Type 3 (Inclusive Multicast Ethernet Tag):
Used for building multicast trees to support BUM (Broadcast, Unknown unicast, and Multicast) traffic in the VXLAN fabric.
- Type 2 (MAC/IP Advertisement):
Used to advertise MAC and optional IP addresses associated with end hosts (such as servers), which is necessary for host reachability in the EVPN fabric.
NEW QUESTION # 31
You have a configuration deviation in the Juniper Apstra dashboard. What does this anomaly indicate in this scenario?
- A. A device's configuration has been changed using a method outside of Apstra.
- B. A device cannot support a configuration command sent by the system.
- C. A device's configuration has been updated by the server.
- D. A device is ready to be configured by the system.
Answer: A
Explanation:
A configuration deviation (also called a configuration anomaly) in Apstra indicates that the device's running configuration differs from Apstra's intended (golden) configuration for that node. In day-to-day operations, this most commonly occurs when an operator makes a change outside of Apstra's control, such as entering commands directly on the device CLI (for example, on a Junos v24.4 switch), using another automation system, or applying an out-of-band configuration method.
Apstra continuously compares the device's operational configuration against what it expects based on blueprint intent. When it detects drift, it raises a deviation anomaly so operators can decide how to restore compliance. Typical remediations are either (1) remove/revert the out-of-band change so the device matches intent again, or (2) explicitly acknowledge the change in Apstra (for example, via an accept/suppress workflow, depending on the exact UI action and version), so the deviation is no longer treated as unexpected.
While it is also possible for a deviation to be triggered by a device not accepting a rendered command (capability mismatch), the question asks what the anomaly indicates in this scenario; the primary meaning of "configuration deviation" is configuration changed outside of Apstra and therefore the network is no longer aligned with the intended state. That corresponds to option C.
NEW QUESTION # 32
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