JN0-481 Exam Dumps and Practice Questions

In Juniper Apstra 5.1, the Event Log is a centralized record used for auditing and operational visibility. It includes audit events (user/system actions) and anomaly-related alerts (events generated when Apstra detects abnormal conditions). In Apstra documentation, anomaly entries are explicitly treated as ''Alert'' records with high severity, meaning the Event Log is a valid place to review anomaly notifications and their associated details. Therefore, the statement that the Event Log stores alerts for anomalies is correct.

The other options do not match the Event Log function. Viewing a device's configuration is handled in device configuration and blueprint operational views, not as the primary purpose of the Event Log. Export behavior, where supported, is described for formats such as CSV rather than PDF, and exporting dashboards is a separate capability from event logging. Finally, while worker nodes are used to offload operational services (such as off-box agents and IBA components), the Event Log is a platform logging feature exposed through the controller UI/API rather than something described as ''running on the worker node'' as its defining trait.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/topic-map/event-log.html

https://www.juniper.net/documentation/us/en/software/apstra5.0/apstra-user-guide/topics/topic-map/event-log.html

https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/topic-map/syslog-config.html

In a three-stage eBGP IP Clos, a leaf typically learns the same prefix through multiple spines, and those spines are commonly in different AS numbers (a standard Clos pattern for simplified operations and fault isolation). To install multiple equal-cost eBGP paths for the same destination, Junos requires BGP multipath and, when the candidate paths come from different neighbor ASs, you must use the multiple-as capability (expressed as ''multipath multiple-as'' in many designs) to bypass the default same-neighbor-AS restriction for multipath selection. This ensures multiple eligible eBGP next-hops can be accepted as equal-cost paths and installed.

Separately, to actually perform load balancing in the forwarding plane across those installed next-hops, Junos uses a load-balancing policy that is applied to the forwarding table via routing-options forwarding-table export . This policy (for example, per-packet or consistent-hash variants, depending on platform and intent) activates the forwarding behavior needed to distribute traffic over the ECMP set.

A ''load-balance policy applied to the BGP group'' is not the required mechanism for ECMP forwarding behavior in this context, and multihop is unnecessary in a Clos underlay because neighbors are typically directly connected.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/load-balancing-bgp-session.html

In Apstra 5.1, a Virtual Network (VN) is Apstra's abstraction for a Layer 2 forwarding domain that groups endpoints into a logical segment across the fabric. Apstra defines virtual networks as being constructed using either VLANs or VXLANs. A VLAN-based VN represents a Layer 2 domain identified by a VLAN ID and is typically used where you want traditional VLAN semantics (often in smaller environments, migration scenarios, or designs where an overlay is not required). A VXLAN-based VN represents the same Layer 2 intent but uses a VXLAN VNI for scalable overlay segmentation, which is the common approach in EVPN-VXLAN data center fabrics.

In an IP fabric architecture, VXLAN provides encapsulation to carry tenant segments over the routed underlay, while EVPN provides the control-plane signaling for MAC/IP reachability. Junos v24.4 leaf devices act as VTEPs, mapping local VLANs/bridge-domains to VNIs and participating in EVPN for advertisement and convergence. Apstra's VN construct allows you to create the segment once (as VLAN or VXLAN type), then consistently attach it to racks, ports, and endpoints through intent-driven workflows (such as connectivity templates and virtual network assignments).

''L2 VPN'' and ''L3 VPN'' are service provider terms and are not the VN ''types'' in Apstra's data center reference design. In Apstra, tenant L3 separation is modeled by routing zones (VRFs), while the VN itself is specifically either VLAN-based or VXLAN-based.

Verified Juniper sources (URLs):

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

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

In Juniper Apstra 5.1, tags are a lightweight metadata mechanism used to classify objects and enable conditional automation (for example, driving dynamic configlets or simplifying filtering/searching in the UI). Apstra supports tagging several blueprint-operational objects that commonly participate in day-1/day-2 workflows.

Virtual networks can be tagged so operators can group, search, and apply automation consistently across sets of segments. This is useful in EVPN-VXLAN fabrics where virtual networks represent VLAN- or VXLAN-backed broadcast domains and you may want policies or configlet logic to apply to all ''finance'' or ''pci'' segments as a group.

Interfaces can be tagged directly within a blueprint (for example, leaf access ports, uplinks, or specific border-facing ports). Interface tags are often used to drive template-based configuration behavior and to simplify operational actions across many ports without relying on fragile naming conventions.

Generic systems (internal or external) can also be tagged. Apstra documentation explicitly describes using tags to specify roles for internal generic systems, enabling you to differentiate server types or attachment roles and then apply the correct intent (connectivity templates, VN attachments, or policies) in a repeatable way.

By contrast, property sets are structured data objects used for parameterization (YAML/JSON values for templates/probes), and device profiles describe hardware/NOS capabilities; they are not the standard blueprint objects for tag assignment in this scenario.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/task/tag-virtual-network-update.html

https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/topic-map/tag-interface-add-remove-datacenter.html

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

In Apstra 5.1, the correct operational method to gracefully remove a switch from service for maintenance is to set its Deploy Mode to Drain. Drain is a day-2 operational control that tells Apstra to adjust intent so the fabric can continue operating while the targeted device is logically taken out of service as much as the design allows. This is especially relevant in EVPN-VXLAN leaf-spine fabrics where taking down a spine or a leaf can disrupt underlay BGP adjacencies and overlay reachability if traffic is not shifted first.

This action is performed from the blueprint's Active view because Drain affects the currently deployed, running fabric state (not a staged design change). Selecting the device under Active and changing Deploy Mode to Drain initiates the workflow that prepares the device for maintenance by reducing its role in forwarding and/or withdrawing dependent services according to the blueprint's modeled redundancy (for example, shifting server-facing traffic to an MLAG/ESI peer where applicable, or reducing reliance on the device for transit). After the device is drained, an OS upgrade can be performed with less impact, and the device can later be returned to service by switching Deploy Mode back to Deploy and committing the change.

The ''Upgrade'' action is not the deploy-mode mechanism described for graceful removal; the key is Deploy Mode Drain from Active, which is explicitly intended for maintenance and decommissioning scenarios.

Verified Juniper sources (URLs):

https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/task/device-drain.html

https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-drain-mode/apstra-drain-mode-guide/topics/concept/apstra-drain-mode-activate-or-disable-drain.html