JN0-481證照資訊，JN0-481證照

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Juniper JN0-481 考試大綱：

主題	簡介
主題 1	Apstra Build and Deploy Phases: Covers fabric deployment tasks including agent installation, cable mapping, device states, deploy modes, and Blueprint UI usage, along with related monitoring and troubleshooting.
主題 2	Blueprint Operations: Covers day-to-day blueprint management including making and reverting changes, querying, virtual networks, Time Voyager, anomaly detection, property sets, configlets, and configuration types.
主題 3	Intent-Based Analytics: Covers Apstra's analytics tools including Graph Explorer, graph queries, and intent-based analytics probes for network monitoring, validation, and troubleshooting.
主題 4	Data Center Architectures (IP Fabrics, EVPN-VXLAN): Covers spine-leaf topology design, ECMP load balancing, and underlay overlay routing, along with EVPN and VXLAN concepts including route types, bridge domains, VNI-to-VLAN mapping, and VTEP functions.
主題 5	Juniper Apstra Architecture: Introduces core Apstra components including the server, device agents, and UI, along with administrative features such as RBAC, event logging, and syslog.

>> JN0-481證照資訊 <<

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最新的 JNCIS-DC JN0-481 免費考試真題 (Q88-Q93):

問題 #88
You staged several changes to your Juniper Apstra blueprint but have not committed them.
In this scenario, what is the effect of selecting Revert?

A. A commit is required to complete the revert operation.
B. All the staged changes are cleared.
C. Only the last staged change will be cleared.
D. The current active configuration will be replaced by the previous active configuration.

答案：B

解題說明：
In Juniper Apstra, when you stage changes to a blueprint, they remain in the Staged area until you commit them. If you choose Revert, all uncommitted (staged) changes are discarded, and the blueprint reverts to its current Active state. This clears everything staged, not just the last change.

問題 #89
In a three-stage Clos network, what are important key design aspects of a data center fabric? (Choose two.)

A. Servers are connected to spine devices.
B. Servers are connected to leaf devices.
C. Fabric traffic enters and exits the border devices.
D. External traffic enters and exits the spine devices.

答案：B,C

解題說明：
A three-stage Clos (leaf-spine) data center fabric separates roles to keep forwarding predictable and scalable. The leaf layer is the attachment point for endpoints, so servers connect to leaf devices. This is where the fabric accepts workload traffic, applies edge policies, and provides tenant/service constructs (for EVPN-VXLAN fabrics, the leafs typically act as VTEPs and host IRB gateways as required). The spine layer provides the non-blocking transit core between leafs using L3 underlay routing and ECMP, but it is not the place where servers attach directly.
For north-south connectivity, a typical three-stage Apstra data center architecture includes border leaf switches. These border devices provide the controlled connection point between the fabric and external networks (Internet/WAN/DCI or upstream services). As a result, fabric traffic enters and exits the border devices, not the spines. This design keeps the spines dedicated to high-speed east-west transit and simplifies operations: external routing policies, security controls, and inter-domain handoffs are concentrated at the border, while the spines remain a uniform L3 transit tier. In Junos v24.4 EVPN-VXLAN deployments, this separation also helps maintain clean overlay boundaries and consistent underlay behavior across the fabric.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/juniper-data-center-assurance/user-guide/topics/concept/dc-network-topology-on-dc-assurance.html
https://www.juniper.net/documentation/us/en/software/jvd/jvd-3-stage-datacenterdesign-with-juniper-apstra/solution_architecture.html
https://www.juniper.net/content/dam/www/assets/white-papers/us/en/design-considerations-for-spine-and-leaf-ip-fabrics.pdf

問題 #90
You are installing a Juniper Apstra server in your data center. You have multiple users that will be expected to configure, manage, and carry out operational tasks in your data center. You have decided to implement remote user authentication for the role-based access control of your Apstra server. In this scenario, which three methods are supported? (Choose three.)

A. LDAP
B. TACACS+
C. RADIUS
D. SAML
E. Auth0

答案：A,B,C

解題說明：
To implement remote user authentication for the role-based access control of your Apstra server, you can use one of the following methods: TACACS+, LDAP, or RADIUS. These are the protocols that Juniper Apstra supports to authenticate and authorize users based on roles assigned to individual users within an enterprise. You can configure the Apstra server to use one or more of these protocols as the authentication sources and specify the order of preference. You can also configure the Apstra server to use local user accounts as a fallback option if the remote authentication fails.

問題 #91
Which three multihoming mechanisms are supported in the Juniper Apstra rack design? (Choose three.)

A. vPC
B. VRRP
C. virtual chassis
D. MLAG
E. ESI

答案：A,D,E

解題說明：
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.

問題 #92
In Juniper Apstra terminology, to which network operating system concept does a routing zone refer?

A. VRF
B. VLAN
C. Access list
D. IRB

答案：A

解題說明：
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

問題 #93
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