Juniper JN0-481 Exam Dumps

Device A serves as a spine in an IP fabric. An IP fabric is a network architecture that uses a spine-leaf topology to provide high performance, scalability, and reliability for data center networks. A spine-leaf topology consists of two layers of devices: spine devices and leaf devices. Spine devices are the core devices that interconnect all the leaf devices using equal-cost multipath (ECMP) routing. Leaf devices are the edge devices that connect to the servers, storage, or other network devices. In the exhibit, Device A is connected to four leaf devices using multiple links, which indicates that it is a spine device. The other options are incorrect because:

A . leaf is wrong because a leaf device is an edge device that connects to the servers, storage, or other network devices. In the exhibit, Device A is not connected to any servers, storage, or other network devices, but only to four leaf devices, which indicates that it is not a leaf device.

C . super spine is wrong because a super spine device is a higher-level device that interconnects multiple spine devices in a large-scale IP fabric. A super spine device is typically used when the number of leaf devices exceeds the port density of a single spine device. In the exhibit, Device A is not connected to any other spine devices, but only to four leaf devices, which indicates that it is not a super spine device.

D . server is wrong because a server device is a compute or storage device that connects to a leaf device in an IP fabric. A server device is typically the end host that provides or consumes data in the network. In the exhibit, Device A is not connected to any leaf devices, but only to four leaf devices, which indicates that it is not a server device.Reference:

IP Fabric Underlay Network Design and Implementation

IP Fabric Overview

IP Fabric Architecture

In Apstra 5.1, servers that connect to leaf switches are represented as generic systems so Apstra can model links, apply connectivity templates, attach virtual networks, and validate intent. The selection of generic system type depends on whether the endpoint is considered part of the rack's internal topology or an external attachment. When you add a new server inside an existing rack type, that server is treated as a component of the rack topology (that is, it lives ''within'' the rack alongside leaf switches and any other rack-internal endpoints). Apstra documentation refers to such systems as internal generic systems.

Internal generic systems are not managed like switches (no full device management), but they are first-class topology objects: they occupy ports on leaf switches, can be tagged with roles, and can be associated with link definitions that drive correct interface intent (LAG vs single link, VLAN tagging, and virtual network association). This modeling is essential in EVPN-VXLAN fabrics because correct endpoint attachment on leaf ports determines VLAN/VNI mapping and the resulting Junos v24.4 configuration rendered by Apstra.

External generic systems, by contrast, represent devices outside the rack topology (often used for external routers, firewalls, or other non-rack-contained endpoints). Because the question explicitly places the server inside an existing rack type, the correct choice is Internal generic.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/topic-map/internal-generic-system-create.html

In Apstra IBA, a probe is a directed graph made of stages (data you can inspect) and processors (operations that transform/aggregate data). While stages can be inspected during probe construction, the simplest operational way to make probe results readily consumable by day-2 operators is to publish them through widgets that can be placed on Analytics dashboards. A dashboard widget is the visualization and presentation object that renders either (1) counts of anomalies or (2) the outputs produced by stages and processors in a probe. Creating a widget tied to the probe output means the operator can open a dashboard and immediately see the metric trends, tables, or anomaly indicators without navigating into probe internals.

A predefined probe is optional content (a starting template) and is not required for visibility. Processors and stages are internal probe building blocks, but they do not, by themselves, create an operator-friendly view in the UI. In a Junos v24.4 EVPN-VXLAN fabric, this is especially useful for link utilization, drops, latency signals, or any custom telemetry pipeline: you build the probe logic once, then expose the key results in a widget that persists across operational workflows and can be shared on standardized dashboards for capacity planning and troubleshooting.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/concept/widgets.html

https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/topic-map/widget-stage-create.html

https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/concept/probes.html

In Apstra 5.1, a routing zone is the primary construct used to represent an L3 domain for multitenant isolation. In traditional network operating system terms, that maps to a VRF (Virtual Routing and Forwarding instance). Each routing zone is placed ''in its own VRF,'' which provides independent routing tables and isolates IP traffic so that different tenants can reuse overlapping IP subnets without conflict. This is central to modern EVPN-VXLAN data center design, where tenants typically require clean separation of routing and policy boundaries.

Within a routing zone, you can create one or more virtual networks (often mapped to VXLAN segments) that provide L2 extension across racks while still being contained by the tenant's VRF. If L3 gateway services are enabled for those virtual networks, their gateway interfaces (for example, IRB interfaces on Junos v24.4 leaf switches) are associated with the routing zone's VRF so that inter-subnet routing occurs within the tenant boundary.

This terminology distinction is important: an IRB is an interface construct used to provide L3 gateway functionality for a VLAN/VXLAN segment; a VLAN is a Layer 2 segmentation mechanism; and an access list is a policy enforcement tool. A routing zone, however, defines the tenant's L3 routing context, which is precisely what a VRF provides on Junos.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/apstra5.0/apstra-user-guide/topics/concept/routing-zones.html

https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/concept/routing-zones.html

The exhibit shows the border leaf receiving multiple routes via BGP from the external router, including 172.23.x/24 prefixes, and those routes appearing in the Finance VRF routing table. To stop these routes from being installed in the Finance table, you must change what the border leaf imports from that eBGP session. In Apstra, this control is implemented through a Routing Policy attached to the protocol session described by the connectivity template. By setting the Import Policy to accept default route only, Apstra renders Junos policy so that only 0.0.0.0/0 is imported into the VRF, while the 172.23.x/24 prefixes are rejected and therefore never installed in Finance.inet.0.

Option C is a common trap: the ''Expect Default IPv4 Route'' setting is an assurance expectation---it generates an expectation/anomaly if the default route is missing, but it does not change device configuration or filtering behavior. Export-policy changes (option D) would only affect what the border leaf advertises outbound to the external router, not what it learns inbound. Aggregation (option A) does not prevent installation of the specific learned /24s; it changes advertisement behavior rather than import filtering. The correct fix is to tighten the import policy on that external eBGP session.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/routing-policies.html

https://www.juniper.net/documentation/us/en/software/apstra6.0/apstra-user-guide/topics/concept/routing-policies.html

https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/concept/connectivity-templates.html