P.S. Testpdf在Google Drive上分享了免費的2026 Juniper JN0-481考試題庫：https://drive.google.com/open?id=13DLFjd_qpZoNERVwookP76lXtcOuq6k-
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在如今人才濟濟的社會中，Juniper專業人士是很受歡迎的，但競爭也很大。所以很多Juniper專業人士通過一些比較難的權威的JN0-481認證考試來穩固自己，而我們Testpdf是專門為參加JN0-481認證考試的考生提供便利的。
問題 #40
In the Juniper Apstra Ul, which three resources are assigned under the Resources menu?
(Choose three.)
答案：B,D,E
解題說明：
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.
問題 #41
Which type of generic system should you select when adding a new server inside an existing rack type?
答案：C
解題說明：
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
問題 #42
You are using Juniper Apstra to create logical devices and interface maps. You use them in three different rack types. You then modify the logical devices to support the required increased interface speeds and receive an error message when updating the logical devices.
Referring to the exhibit, which action is needed to remove the error?
答案：A
解題說明：
In Apstra 5.1, a logical device defines the abstract port layout and capabilities (including supported speeds), while an interface map binds that abstract port layout to the real, vendor-specific front-panel ports. Rack types then consume logical devices and interface maps to model the rack's leaf/superspine roles. Once a logical device is referenced by interface maps and used inside rack types (and potentially templates that instantiate those rack types), Apstra treats the combination as a consistent contract: port counts, roles, and speeds must remain semantically valid for every object that depends on it.
The exhibit's validation error indicates that after changing interface speeds on the logical device, the existing interface map(s) and their usage in rack types no longer match the logical device definition (for example, the map expects certain ports/speeds/roles, but the updated logical device would leave the map invalid). Because the logical device is being consumed in multiple places, the safest and required way to remove the error is to remove all dependencies-templates (if they reference the rack types), rack types, and interface maps-so Apstra can accept the new logical device definition without violating existing mappings. After updating the logical device, you then recreate or update the interface maps and re-associate them with the rack types/templates so the entire chain remains consistent under the new speed requirements.
問題 #43
You are considering the bridged overlay EVPN-VXLAN architecture. In this scenario, how many VLANs would be enabled in the VLAN-based service type at the MAC-VRF EVPN instance level?
答案：C
解題說明：
In Junos EVPN, the service type determines how VLANs (broadcast domains) are mapped into EVPN constructs. With VLAN-based service, the mapping is one-to-one: a single VLAN (single broadcast domain) maps to a single EVPN instance (EVI), resulting in a separate bridge table per VLAN. When you implement EVPN-VXLAN in a bridged overlay (L2 extension over an L3 underlay), leaf devices act as VTEPs and encapsulate VLAN traffic into VXLAN using the associated VNI, but the service-type mapping rule still applies.
At the MAC-VRF hierarchy, you configure the EVPN-VXLAN parameters and choose the service type for that EVPN instance. If the service type selected is VLAN-based, then the EVI represents exactly one VLAN at that EVPN instance level. If you need multiple VLANs under the same MAC-VRF/EVI construct, Junos provides alternative service types (for example, VLAN-aware or VLAN-bundle) specifically intended to associate multiple VLANs with a single EVPN instance; that is not what VLAN-based service does.
Therefore, in a bridged overlay EVPN-VXLAN design using VLAN-based service at the MAC-VRF EVPN instance level, the correct answer is one VLAN. This remains true regardless of how many total VLANs exist across the fabric; each VLAN-based EVI handles a single VLAN.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/concept/evpn-based-services.html
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/concept/mac-vrf-routing-instance-overview.html
問題 #44
You connect two single-homed servers using Juniper Apstra as shown in the exhibit. You are using the ERB design blueprint with two virtual networks in a common routing zone. In this scenario, which two types of VXLAN tunnels will be automatically created by the EVPN control plane? (Choose two.)
答案：A,B
解題說明：
EVPN route Type-3 is used to advertise the IP address of the VTEP and the VNIs that it supports.
This allows the VTEPs to discover each other and form VXLAN tunnels for the VNIs that they have in common. EVPN route Type-2 is used to advertise the MAC and IP addresses of the hosts connected to the VTEPs. This allows the VTEPs to learn the MAC-to-IP bindings and the MAC-to- VTEP mappings for the hosts in the same VNI. Therefore, these two types of VXLAN tunnels will be automatically created by the EVPN control plane when using Juniper Apstra with the ERB design blueprint and two virtual networks in a common routing zone.
問題 #45
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