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質問 # 11
Which three multihoming mechanisms are supported in the Juniper Apstra rack design? (Choose three.)
正解:B、C、D
解説:
In Juniper Apstra rack designs, the supported multihoming mechanisms are:
- vPC (Virtual Port Channel) for multihoming with certain vendor devices.
- ESI (Ethernet Segment Identifier), part of EVPN multihoming.
- MLAG (Multi-Chassis Link Aggregation Group) for providing multihoming and redundancy.
質問 # 12
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?
正解:B
解説:
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.
質問 # 13
In the Juniper Apstra UI, what are two aspects that you are able to query under the Active tab within a blueprint? (Choose two.)
正解:C、D
解説:
In the Juniper Apstra UI, under the Active tab within a blueprint, operators can query real-time operational data collected from devices. This includes aspects such as ARP tables and MAC tables, which help verify active device state and connectivity in the deployed fabric.
質問 # 14
In Juniper Apstra, what does the "Staged" state of a blueprint represent?
正解:D
解説:
In Juniper Apstra, changes made to a blueprint are first placed into a Staged state, representing proposed modifications that have not yet taken effect. Administrators can review these staged changes, and once satisfied, commit them to make them Active, at which point Apstra renders and pushes the corresponding configuration to the affected devices.
質問 # 15
Which type of generic system should you select when adding a new server inside an existing rack type?
正解:C
解説:
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
質問 # 16
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