JN0-481学習資料、JN0-481受験準備

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Juniper JN0-481 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Apstra Design Phase: Covers pre-deployment planning elements such as reference designs, logical devices, device profiles, rack types, interface maps, and templates, including their configuration and troubleshooting.
トピック 2	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.
トピック 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.
トピック 4	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.
トピック 5	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.
トピック 6	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.

>> JN0-481学習資料 <<

JN0-481受験準備、JN0-481認定試験

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Juniper Data Center, Specialist (JNCIS-DC) 認定 JN0-481 試験問題 (Q54-Q59):

質問 # 54
You are performing an upgrade to your switches in your network. You want to ensure that the upgrade can be performed without interrupting traffic.
In the Juniper Apstra UI, which deploy mode should be used to accomplish this task?

A. Deploy
B. Drain
C. Ready
D. Undeploy

正解：B

解説：
In Juniper Apstra, the Drain deploy mode is used to gracefully remove a device from service.
When set to Drain, traffic is rerouted away from the device so that tasks such as OS upgrades can be performed without interrupting live traffic in the fabric. Once the upgrade is complete, the device can be returned to Deploy mode to resume normal operation.

質問 # 55
Referring to the exhibit, which statement is correct?

A. The gray-solid primitives indicate further configuration is requited.
B. The red-striped primitives indicate that they are incompatible with the connectivity template design.
C. The red-striped primitives indicate that further configuration is required.
D. The gray-solid primitives indicate that they ate incompatible with the connectivity template design.

正解：C

解説：
A connectivity template is a set of configuration parameters that can be applied to a device or a group of devices in a blueprint. A blueprint is a logical representation of the network design and intent. A primitive is a basic unit of configuration that can be added to a connectivity template. A primitive can be a link, a peering, a policy, or a service. In the exhibit, the red-striped primitives indicate that further configuration is required for them to be compatible with the connectivity template design. The red stripes mean that the primitive is incomplete or invalid, and it needs to be edited or deleted. For example, the IP Link primitive needs to have the interface name and IP address specified for each end of the link.

質問 # 56
You are creating a template using Juniper Apstr
a. In this scenario, what is a rack-based design compared to a pod-based design?

A. A rack-based design connects local servers only, whereas a pod-based design can include virtual workloads in a public cloud.
B. A rack-based design allows the operator to select a specified number of downlinked servers, whereas a pod-based design only allows the operator to select fixed "pods" of servers.
C. A rack-based design is suitable for physical servers, whereas a pod-based design is used for Kubernetes deployments.
D. A rack-based design refers to a three-stage Clos, and a pod design refers to a five-stage Clos.

正解：D

解説：
In Apstra 5.1, templates are used to describe the intended structure of a data center fabric. A rack-based template is used to build the common 3-stage Clos model (spines connected to racks containing leaf/top-of-rack switches and endpoints). In this design, you define the spine logical devices, select one or more rack types, specify rack counts, and define the intended connectivity between spines and racks. This directly models a leaf-spine IP fabric typically used for EVPN-VXLAN in modern data centers.
A pod-based template, by contrast, is explicitly used to build 5-stage Clos networks. In Apstra's terminology, a pod-based template is essentially a "template of templates": it combines one or more rack-based templates (each representing a 3-stage pod) and adds an additional superspine layer to interconnect those pods into a larger, scalable fabric. This is the architectural distinction: rack-based describes the leaf-spine pod, while pod-based describes the multi-pod superspine architecture.
For Junos v24.4 EVPN-VXLAN deployments, the difference matters operationally because 5-stage fabrics introduce additional tiers and scaling considerations (for example, superspine connectivity and expanded ECMP domains). Apstra's template hierarchy ensures consistent intent modeling across both 3-stage and 5-stage topologies without requiring operators to manually redesign the fabric logic each time they scale out.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/templates.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/task/template-create-pod-based.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/topic-map/5-stage-clos.html

質問 # 57
You are performing an upgrade to your switches in your network. You want to ensure that the upgrade can be performed without interrupting traffic. In the Juniper Apstra UI, which deploy mode should be used to accomplish this task?

A. Deploy
B. Drain
C. Ready
D. Undeploy

正解：B

解説：
In Apstra, Deploy Mode = Drain is the operational mechanism used to gracefully remove a switch from active forwarding before performing maintenance such as an OS upgrade. Drain mode is specifically intended to drain traffic while preserving fabric stability, so that maintenance can be executed with minimal to no application impact, provided the fabric design has sufficient redundancy (for example, ECMP in the underlay and dual-homing/ESI for server attachments). In an EVPN-VXLAN IP fabric, taking a leaf or spine abruptly out of service can cause transient loss of reachability as underlay adjacencies reconverge and the overlay recalculates paths. By placing the device into Drain, Apstra adjusts intent so that traffic is shifted away from the device as much as possible, reducing dependency on it before the upgrade begins.
This is different from Undeploy, which removes Apstra-rendered configuration and is generally used for decommissioning; if a device is carrying traffic, Apstra guidance is to drain first. Ready is a pre-deploy state used in lifecycle workflows, not a maintenance traffic-shifting mode. Deploy keeps the device fully participating. Therefore, for a maintenance window where the goal is "upgrade with minimal interruption," the correct mode is Drain, then perform the Junos v24.4 upgrade, and finally return the device to Deploy.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-drain-mode/apstra-drain-mode.pdf
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/topic-map/deploy-mode-update-datacenter.html
https://www.juniper.net/documentation/us/en/software/apstra6.0/apstra-user-guide/topics/topic-map/device-config-lifecycle.html

質問 # 58
Referring to the exhibit, what needs to change in the IP fabric to make it a valid IP fabric?

A. The IP fabric must consist of only one device model throughout the fabric.
B. The IP fabric connections must be increased to a speed greater than 10 Gbps.
C. The connection between the two spine nodes must be removed.
D. The connection between the two spine nodes must be increased to 40 Gbps.

正解：C

解説：
To make the IP fabric a valid IP fabric, the connection between the two spine nodes must be removed. This is because an IP fabric is a network topology that uses a spine-leaf architecture, where the spine devices are only connected to the leaf devices, and the leaf devices are only connected to the spine devices. This creates a non-blocking, high-performance, and scalable network that supports Layer 3 routing protocols such as BGP or OSPF. The connection between the two spine nodes in the exhibit violates the spine-leaf design principle and introduces unnecessary complexity and potential loops in the network.

質問 # 59
......

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JN0-481受験準備: https://www.mogiexam.com/JN0-481-exam.html

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