Juniper JN0-480 Data Center, Specialist Exam Practice Test

Answer : D

A graph query is a component that identifies devices that supply data for a specific probe. A graph query is an expression that matches nodes in the Apstra graph database based on their attributes, such as device name, role, type, or tag.A graph query can be used to select the source devices for the input processors of a probe, as well as to filter the data by device attributes in the subsequent processors of a probe12.Reference:

Probes

Apstra IBA Getting Started Tutorial

Answer : A, B

In the case of IP Clos data center five-stage fabric design, the super spines are the devices that provide the highest level of aggregation in the network. They have two main roles:

Super spines are used to interconnect two different data center pods. A pod is a cluster of leaf and spine devices that form a 3-stage Clos topology. A 5-stage Clos topology consists of multiple pods that are connected by the super spines. This allows for scaling the network to support more devices and bandwidth.

Super spines connect to all spine devices within the five-stage architecture. The spine devices are the devices that provide the second level of aggregation in the network. They connect to the leaf devices, which are the devices that provide access to the end hosts. The super spines connect to all the spine devices in the network, regardless of which pod they belong to. This provides any-to-any connectivity between the pods and enables optimal routing and load balancing.

The following two statements are incorrect in this scenario:

Super spines are used to connect leaf nodes within a data center pod. This is not true, because the leaf nodes are connected to the spine nodes within the same pod. The super spines do not connect to the leaf nodes directly, but only through the spine nodes.

Super spines are always connected to an external data center gateway. This is not true, because the super spines are not necessarily involved in the external connectivity of the data center. The external data center gateway is a device that provides the connection to the outside network, such as the Internet or another data center. The external data center gateway can be connected to the super spines, the spine nodes, or the leaf nodes, depending on the design and the requirements of the network.

5-stage Clos Architecture --- Apstra 3.3.0 documentation

5-Stage Clos Architecture | Juniper Networks

Extreme Fabric Automation Administration Guide

Answer : D

According to the Juniper documentation1, a five-stage Clos architecture allows for large-scale topologies with an additional aggregation layer that interconnects multiple pods into a single fabric. A pod is a group of racks that share the same spine devices. A rack is a group of leaf devices that connect to the same servers. To create a five-stage Clos network using Juniper Apstra, you need to choose the pod-based fabric type in the template creation wizard. This will allow you to specify the number of pods, planes, spines, and leaves for your network design. Therefore, the correct answer is D. pod-based.Reference:5-Stage Clos Architecture | Apstra 4.1 | Juniper Networks

Answer : D

To configure a static route for traffic to exit a configured routing zone, you need to use the Connectivity Templates feature in the Juniper Apstra UI. A Connectivity Template is a set of configuration parameters that can be applied to a device or a group of devices in a blueprint. You can use Connectivity Templates to configure static routes, BGP, OSPF, and other network services. To create a Connectivity Template, you need to go to the Staged tab and select Connectivity Templates from the left menu. Then, you can click on the + icon to create a new template. You can specify the name, description, and scope of the template. The scope determines which devices or device groups the template will be applied to. You can also specify the order of the template, which determines the priority of the template when multiple templates are applied to the same device. After creating the template, you can add configuration items to the template. To add a static route, you need to select Static Route from the drop-down menu and enter the destination network, subnet mask, and next-hop IP address. You can also specify the administrative distance and the track object for the static route. After adding the configuration items, you need to save the template and commit the changes to the blueprint. The other options are incorrect because:

A) under Active -> Virtual -> Routing Zones is wrong because this option allows you to view and modify the existing routing zones, but not to configure static routes for them.

B) under Staged -> Virtual -> Routing Zones is wrong because this option allows you to create and delete routing zones, but not to configure static routes for them.

C) under Active -> Connectivity Templates is wrong because this option allows you to view the existing connectivity templates, but not to create or modify them.Reference:

Connectivity Templates

Data Center Automation Using Juniper Apstra

Answer : A, D, E

Juniper Apstra supports three deploy modes for devices:Deploy,Drain, andReady.These modes determine the configuration and state of the devices in the data center fabric12.

Deploy: This mode applies the full Apstra-rendered configuration to the device, according to the Apstra Reference Design.The device state becomesIS-ACTIVEand the device is ready to carry traffic in the fabric12.

Drain: This mode adds a ''drain'' configuration to the device, which prevents any new traffic from entering the device.The device state becomesIS-READYand the device is prepared for maintenance or decommissioning12.

Ready: This mode removes the Apstra-rendered configuration from the device, leaving only the basic configuration such as device hostname, interface descriptions, and port speed/breakout.The device state becomesIS-READYand the device is not part of the fabric12.Reference:

Device Configuration Lifecycle

Set Deploy Mode (Datacenter)

Answer : C

To create a new routing zone, you must specify the VRF Name, VLAN ID, and VNI for the routing zone. These are the mandatory fields in the user interface shown in the exhibit. The VRF Name is the name of the L3 domain that isolates the IP traffic of the routing zone from other routing zones. The VLAN ID is the identifier for the VLAN tagged Layer 3 links on external connections. The VNI is the VxLAN Network Identifier associated with the routing zone. The Routing Policies are optional fields that allow you to configure import and export route targets for the routing zone. These are only applicable for EVPN routing zones, which use MP-EBGP as the overlay control protocol. The other options are incorrect because:

A) VRF Name only is wrong because you also need to specify the VLAN ID and VNI for the routing zone.

B) VRF Name and Routing policies is wrong because you also need to specify the VLAN ID and VNI for the routing zone. Routing policies are optional and only relevant for EVPN routing zones.

D) VRF Name, VLAN ID, VNI, Routing Policies is wrong because Routing Policies are optional and not required to create a new routing zone.Reference:

Routing Zones (Virtual)

Data Center Automation Using Juniper Apstra

Answer : D

The cable map is a graphical representation of the physical connections between the devices in the data center fabric. It shows the status of the cables, interfaces, and BGP sessions for each device. You can use the cable map to identify and troubleshoot any cable, interface, or BGP anomalies that may occur in the fabric.You can also filter the cable map by device name, device type, device role, device state, cable state, interface state, or BGP state12.Reference:

Cable Map Overview

Cable Map User Guide