The Best Practice Test Preparation for the JN0-481 Certification Exam
JN0-481 Exam Dumps, Practice Test Questions BUNDLE PACK
Juniper JN0-481 Exam Syllabus Topics:
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NEW QUESTION # 42
Which Juniper Apstra role-based access control (RBAC) role grants full administrative control over the entire Apstra system, including user management?
- A. Superuser
- B. Viewer
- C. Tenant Admin
- D. Blueprint Admin
Answer: A
Explanation:
The Superuser role in Juniper Apstra has full administrative privileges across the entire system, including the ability to create and manage users, roles, blueprints, and all other system-wide settings. This is distinct from more limited roles like Blueprint Admin, which restricts administrative control to specific blueprints only.
NEW QUESTION # 43
Which two actions are required during Juniper Apstra's deploy phase? (Choose two.)
- A. Assign interlace maps to the blueprint.
- B. Assign user roles to the blueprint.
- C. Assign device profiles to the blueprint.
- D. Assign resources to the blueprint.
Answer: C,D
Explanation:
The deploy phase is the final step in the Juniper Apstra data center fabric design and deployment process. In this phase, you apply the Apstra-rendered configuration to the devices and verify the intent of the blueprint. Based on the web search results, we can infer the following actions are required during the deploy phase:
Assign device profiles to the blueprint. This action associates a specific vendor model to each logical device in the blueprint. Device profiles contain extensive hardware model details, such as form factor, ASIC, CPU, RAM, ECMP limit, and supported features. Device profiles also define how configuration is generated, how telemetry commands are rendered, and how configuration is deployed on a device. Device profiles enable the Apstra system to render and deploy the configuration according to the Apstra Reference Design. Assign resources to the blueprint. This action allocates the physical devices, IP addresses, VLANs, and ASNs to the logical devices, networks, and routing zones in the blueprint. Resources can be assigned manually or automatically by the Apstra system. Assigning resources ensures that the blueprint has all the necessary elements to generate the configuration and deploy the fabric5 . Assign user roles to the blueprint. This action is not required during the deploy phase. User roles are defined at the system level, not at the blueprint level. User roles determine the permissions and access levels of different users in the Apstra system. User roles can be system-defined or custom-defined .
Assign interface maps to the blueprint. This action is not required during the deploy phase.
Interface maps are defined at the design phase, not at the deploy phase. Interface maps are objects that map the logical interfaces of a logical device to the physical interfaces of a device profile. Interface maps enable the Apstra system to generate the correct interface configuration for each device in the fabric.
NEW QUESTION # 44
What is the purpose of an EVPN Ethernet segment identifier (ESI)?
- A. To specify a BGP community
- B. To identify Layer 2 frame types for filtering purposes
- C. To prevent loops within a LAG connection
- D. To provide a hop count between devices
Answer: C
Explanation:
In EVPN multihoming, the Ethernet Segment Identifier (ESI) is the mandatory identifier used to represent a multihomed Ethernet segment-for example, a server or downstream switch that is dual-homed to two leaf devices using a single logical LAG/port-channel. By assigning the same ESI to the participating leaf-facing interfaces, the fabric recognizes those links as belonging to one Ethernet segment and can apply EVPN multihoming procedures consistently across the pair.
A key outcome of EVPN multihoming is loop prevention for multi-attached Layer 2 domains. EVPN uses the Ethernet segment concept (identified by the ESI) along with Designated Forwarder (DF) election to ensure that only the appropriate device forwards BUM (broadcast, unknown unicast, multicast) traffic toward the multihomed segment, avoiding duplicate forwarding and L2 loops. In addition, ESI-based multihoming supports resilient forwarding behavior during failures (for example, link or node loss) while maintaining correct advertisement and convergence in the EVPN control plane.
Therefore, among the provided options, the purpose that best matches how ESI is used operationally is to prevent loops within a LAG/multihomed connection, which is fundamental to EVPN-VXLAN data center designs on Junos v24.4 leaf devices and is also explicitly supported by Apstra when modeling ESI-based dual-homing.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/nce/evpn-lag-multihoming-guide/topics/concept/evpn-lag-guide-introduction.html
https://www.juniper.net/documentation/us/en/software/nce/evpn-lag-multihoming-guide/topics/task/evpn-lag-guide-esi-types-lacp.html
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/topic-map/evpn-mh-df-election.html
NEW QUESTION # 45
Exhibit.
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 technology1.
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 networks2.
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. Therefore, the statement C is correct in this scenario.
The following three statements are incorrect in this scenario:
A . 1. This is not true, because there are not one, but two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. 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.
B . 4. This is not true, because there are not four, but two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. The spine devices and the leaf devices that are not connected to the servers are not part of the broadcast domains, because they use IP routing and VXLAN encapsulation to transport the Ethernet frames over the Layer 3 network.
D . 3. This is not true, because there are not three, but two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. 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.
Reference:
IP Fabric Overview
Broadcast Domain - NetworkLessons.com
NEW QUESTION # 46
What are two agent processes that operate within the Juniper Apstra device agent? (Choose two.)
- A. authentication agent
- B. deployment agent
- C. routing agent
- D. telemetry agent
Answer: B,D
Explanation:
Within the Juniper Apstra device agent, two of the key processes are:
- Telemetry agent, which collects operational and state data from the device and reports it back to the Apstra server.
- Deployment agent, which applies configuration changes delivered by Apstra to the device.
NEW QUESTION # 47
Multilenancy for applications is achieved by creating virtual networks (VNs) within which construct?
- A. connectivity template
- B. security policy
- C. routing zone
- D. routing table
Answer: C
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.
NEW QUESTION # 48
What are two available Juniper Apstra template types? (Choose two.)
- A. Rack-based
- B. Collapsed
- C. Compressed
- D. Device-based
Answer: A,B
Explanation:
In Juniper Apstra 5.1, a template is a design abstraction used to create a blueprint. It captures the intended topology shape and design rules without tying the design to a specific vendor's CLI. Apstra supports multiple template types to match common data center fabric architectures.
A rack-based template is used for the standard three-stage Clos (leaf-spine) approach. In this model, you define the spine logical devices and one or more rack types (containing leaf devices and optional endpoint constructs). This is the dominant pattern for EVPN-VXLAN IP fabrics: leaf switches provide server attachment, VXLAN encapsulation (VTEP function), and optional IRB gateways, while spines provide high-capacity L3 transit with ECMP.
A collapsed template is used for a spine-less (spineless) topology. Instead of a separate spine tier, a collapsed design models a fabric where leaf nodes interconnect in a mesh-like arrangement (as supported by the template type) to provide underlay reachability and redundancy. This can be useful for smaller environments or edge data centers where a full spine tier is unnecessary.
"Compressed" and "device-based" are not Apstra template types. Junos v24.4 is relevant when the blueprint is instantiated and deployed, but the template type selection is an Apstra design-time decision that determines the fabric topology class.
NEW QUESTION # 49
Which Juniper Apstra feature allows an administrator to inject custom CLI configuration that is not natively supported by the Apstra intent-based model?
- A. Device Profile
- B. Configlet
- C. Property Set
- D. Anomaly
Answer: B
Explanation:
Configlets in Juniper Apstra allow administrators to insert custom, vendor-specific CLI configuration snippets into the rendered device configuration. This is useful for features or settings not natively modeled by Apstra's intent-based system, ensuring that required configuration can still be applied consistently across devices in the blueprint.
NEW QUESTION # 50
You are trying to deploy a five-stage template to a blueprint as shown in the exhibit. You cannot see your template name in the list of available templates.
In this scenario, which statement is correct?
- A. The Collapsed option should be selected.
- B. Only Freeform-type blueprints support five-stage templates.
- C. The Pod Based option should be selected.
- D. You must include "five-stage" in the template name for it to appear in the list.
Answer: C
Explanation:
In Apstra 5.1, templates are organized by template type, and the Create Blueprint screen can filter the template list by those types. A five-stage Clos design in Apstra is represented as a pod-based template (multi-pod fabric with an additional tier such as super-spines to interconnect pods). Because of that, a five-stage template will only appear in the template selector when the Pod Based filter is chosen. If the filter is set to Rack Based or Collapsed, Apstra hides pod-based templates because those types correspond to different topology classes: rack-based aligns with a three-stage leaf-spine pod, while collapsed aligns with a spine-less topology pattern.
This behavior is by design to prevent selecting an incompatible template for the intended topology. The template name itself does not need to contain "five-stage"; Apstra determines its type from how the template was created and stored in the catalog. Also, five-stage templates are not limited to Freeform blueprints-five-stage is a data center fabric topology choice, and it is supported within the data center reference design workflows when the appropriate template type is selected.
So, to make the five-stage template visible and selectable, choose Pod Based in the template filter.
NEW QUESTION # 51
Referring to the exhibit, what is the minimum information you must add to create a new routing zone?
- A. VRF Name and Routing policies
- B. VRF Name, VLAN ID. And VNI
- C. VRF Name, VLAN ID, VNI, Routing Policies
- D. VRF Name only
Answer: B
Explanation:
To create a new routing zone, you must specify the VRF Name, VLAN ID, and VNI for the routing zone. These are the mandatory fields in the user interface shown in the exhibit. The VRF Name is the name of the L3 domain that isolates the IP traffic of the routing zone from other routing zones.
The VLAN ID is the identifier for the VLAN tagged Layer 3 links on external connections. The VNI is the VxLAN Network Identifier associated with the routing zone. The Routing Policies are optional fields that allow you to configure import and export route targets for the routing zone.
These are only applicable for EVPN routing zones, which use MP-EBGP as the overlay control protocol.
NEW QUESTION # 52
You are deploying a data center fabric using Juniper Apstra. The fabric contains 100 leafs and four spines.
Which statement is correct about IP addressing in this scenario?
- A. IP addresses must be assigned manually to each interface.
- B. IP addresses come from IP resource pools.
- C. Apstra supports pulling IP addresses from IPAMs.
- D. Apstra supports unnumbered EBGP with EVPN-VXLAN networks.
Answer: B
Explanation:
In a Juniper Apstra-managed data center fabric, IP addresses are automatically allocated from IP resource pools defined within Apstra. These pools are used to assign addresses to loopbacks, inter-switch links, and other infrastructure elements, ensuring consistency and automation across the fabric.
NEW QUESTION # 53
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. Drain
- B. Deploy
- C. Ready
- D. Undeploy
Answer: C,D
Explanation:
Apstra deploy modes control how far a device progresses in the configuration lifecycle and whether it becomes active in the fabric. If you must keep leaf3-sonic present in the blueprint (modeled, cabled, and available for future use) but you do not want it to participate in IP-fabric routing, you use modes that keep the device not active.
Ready mode assigns the device to the blueprint and applies only "Ready (Discovery 2)" level configuration-hostnames, interface descriptions, and port speed/breakout settings-while explicitly keeping the device out of fabric routing. In this mode, Apstra does not configure routing/BGP or L3 interface addressing for the IP fabric, so the switch is staged and visible for validation (for example, LLDP wiring checks) but does not forward as part of the Clos underlay.
Undeploy mode removes the complete Apstra service configuration from the device. Operationally, this also ensures the device is not active in the fabric. It is commonly used when a device must be retained in the blueprint inventory/topology but should not be participating (for example, temporarily withdrawn, decommission preparation, or held as a spare).
By contrast, Deploy makes the device active (full rendered fabric configuration, including BGP), and Drain is a maintenance state used to gracefully remove traffic from an already-active device rather than a state for keeping it non-participatory from the outset.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra6.0/apstra-user-guide/topics/topic-map/device-config-lifecycle.html
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/topic-map/device-config-lifecycle.html
NEW QUESTION # 54
You want to route between tenants in a multitenant environment in Juniper Apstra.
What are two ways to accomplish this task? (Choose two.)
- A. Use virtual networks to route between VRFs.
- B. Route between VRFs on a VTEP-enabled device.
- C. Use IBGP to route within the same AS number.
- D. Use an external device to route between tenants.
Answer: B,D
Explanation:
You can route between VRFs on a VTEP-enabled device (such as a border leaf), enabling inter- VRF communication within the fabric.
You can also use an external device, such as a firewall or external router, to perform inter-tenant routing when routing must occur outside the fabric.
NEW QUESTION # 55
You are performing an upgrade to your switches in your network. You want to ensure that the upgrade can be performed without interrupting traffic.
In the Juniper Apstra UI, which deploy mode should be used to accomplish this task?
- A. Undeploy
- B. Ready
- C. Drain
- D. Deploy
Answer: C
Explanation:
In Juniper Apstra, the Drain deploy mode is used to gracefully remove a device from service.
When set to Drain, traffic is rerouted away from the device so that tasks such as OS upgrades can be performed without interrupting live traffic in the fabric. Once the upgrade is complete, the device can be returned to Deploy mode to resume normal operation.
NEW QUESTION # 56
What are two system-defined user roles that are available in Juniper Apstra? (Choose two.)
- A. user
- B. root
- C. authorized
- D. viewer
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 # 57
Which statement correctly describes a Routing Zone in Juniper Apstra?
- A. It is used only for underlay BGP peering.
- B. It replaces the need for virtual networks.
- C. It is equivalent to a VRF and provides Layer 3 isolation for a set of virtual networks.
- D. It defines the physical topology of the fabric.
Answer: C
Explanation:
A Routing Zone in Juniper Apstra corresponds to a VRF instance and provides Layer 3 isolation for a group of virtual networks assigned to it. Routing Zones allow multiple tenants to maintain separate routing tables within the same physical fabric, supporting multi-tenancy while keeping traffic and route tables logically separated.
NEW QUESTION # 58
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