Practice Free JN0-480 Exam Online Questions – Page 2

Question #11

Exhibit.

Which two statements ate correct about the information shown in the exhibit? (Choose two.)

A . The system is fully managed by Juniper Apstra.
B . The device shown is a generic system.
C . Four physical interfaces exist in a LAG facing the leaf pair.
D . The physical ports are not part of the LAG.

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Question #12

Which fabric type should be chosen in a template to create a five-stage Clos?

A . collapsed
B . circuit switched
C . rack-based
D . pod-based

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Question #13

Multilenancy for applications is achieved by creating virtual networks (VNs) within which construct?

A . security policy
B . routing table
C . connectivity template
D . routing zone

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Question #14

Which two statements about VXLAN VNIs are correct? (Choose two.)

A . VNIs can have over 16 million unique values.
B . VNIs identify a collision domain.
C . VNIs identify a broadcast domain
D . VNIs are alphanumeric values.

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Question #15

Which three statements describe intent-based analytics? (Choose three.)

A . It indicates when device operating versions require updating.
B . It is a real-time information processing pipeline.
C . It is used to establish network performance baselines.
D . It alerts the network operator when network performance moves away from the baseline.
E . It collects information from vendor websites.

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Correct Answer: B C D
B C D

Explanation:

Intent-based analytics (IBA) is a feature of Juniper Apstra that allows you to combine intent from the network design with current and historic data from devices to reason about the network at-large1.

IBA has the following characteristics:

– It is a real-time information processing pipeline. This means that IBA can ingest, process, and analyze

large amounts of data from devices in real time, using agents and probes. Agents are software components that collect data from devices and send them to the Apstra server. Probes are user-defined queries that aggregate data across devices and generate advanced data that can be more easily reasoned about1.

– It is used to establish network performance baselines. This means that IBA can use the advanced data to measure and monitor the network performance against the expected outcomes and service levels. IBA can also use the historic data to create baselines that represent the normal behavior and state of the network2.

– It alerts the network operator when network performance moves away from the baseline. This means that IBA can detect and report any anomalies or deviations from the baseline or the intent in the network. IBA can also provide insights and recommendations for troubleshooting and resolving the issues2.

The following two statements are incorrect in this scenario:

– It indicates when device operating versions require updating. This is not true, because IBA does not provide any information or guidance about the device operating versions or updates. IBA is focused on the network performance and compliance, not on the device maintenance or upgrade1.

– It collects information from vendor websites. This is not true, because IBA does not collect any information from vendor websites or external sources. IBA only collects information from the devices in the network, using agents and probes1.

References:

– Intent-Based Analytics ― Apstra 3.3.0 documentation

– What is Intent Based Networking? | Juniper Networks US

Question #16

Which statement is correct about making changes to a predefined device profile in Juniper Apstra?

A . The changes you make to a predefined device profile will be discarded and overwritten when upgrading the Apstra server version.
B . The processor load on the Apstra server will be negatively impacted when changes are made to a predefined device profile.
C . Changing the predefined device profile will also affect deployed devices that use the same profile.
D . You must reboot the Apstra server after changes are made to a predefined device profile before they will become active.

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Question #17

You must configure a static route for traffic to exit a configured routing zone. In the Juniper Apstra Ul. where would you accomplish this task?

A . under Active -> Virtual -> Routing Zones
B . under Staged -> Virtual -> Routing Zones
C . under Active -> Connectivity Templates
D . under Staged -> Connectivity Templates

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Question #18

In the Juniper Apstra Ul. which two resource types would be created in the Resources menu? (Choose two.)

A . bridge domain identifier (BDI)
B . DHCP pools
C . ASN pools
D . IP pools

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Question #19

Exhibit.

In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Lead and Leat6 using the same virtual network identifier (VNI).

Which two statements are correct in this scenario? (Choose two.)

A . The underlay must use IRB interfaces.
B . The underlay must be provisioned with PIMv2.
C . Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices.
D . The underlay EBGP peering’s must be established between leaf and spine devices.

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Correct Answer: C D
C D

Explanation:

In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Leaf1 and Leaf6 using the same virtual network identifier (VNI). This means that the servers belong to the same Layer 2 domain and can communicate with each other using VXLAN tunnels across the fabric. The underlay network provides the IP connectivity between the leaf and spine devices, and it uses EBGP as the routing protocol. Therefore, the following two statements are correct in this scenario:

– Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices. This is because the loopback addresses are used as the source and destination IP addresses for the VXLAN tunnels, and they must be reachable by all the devices in the fabric. The loopback addresses are also used as the router IDs and the BGP peer addresses for the EBGP sessions.

– The underlay EBGP peering’s must be established between leaf and spine devices. This is because the EBGP sessions are used to exchange the underlay routing information and the EVPN routes for the overlay network. The EBGP sessions are established using the loopback addresses of the devices, and they follow a spine-and-leaf topology, where each leaf device peers with all the spine devices, and each spine device peers with all the leaf devices.

The following two statements are incorrect in this scenario:

– The underlay must use IRB interfaces. This is not true, because the underlay network does not provide any Layer 3 gateway functionality for the overlay network. The IRB interfaces are used to provide inter-VXLAN routing within the fabric, which is not the case in the bridged overlay architecture. The IRB interfaces are used in the edge-routed bridging (ERB) or the centrally-routed bridging (CRB) architectures, which are different from the bridged overlay architecture.

– The underlay must be provisioned with PIMv2. This is not true, because the underlay network does not use multicast for the VXLAN tunnels. The VXLAN tunnels are established using EVPN, which uses BGP to distribute the MAC and IP addresses of the end hosts and the VTEP information of the devices. EVPN eliminates the need for multicast in the underlay network, and it provides optimal forwarding and fast convergence for the overlay network.

References:

– Exploring EVPN-VXLAN Overlay Architectures C Bridged Overlay

– EVPN LAGs in EVPN-VXLAN Reference Architectures

– EVPN-VXLAN Configuration Guide

Question #20

Which statement about Juniper Apstra role-based access control is correct?

A . The viewer role is predefined and can be deleted.
B . The administrator role can see all permissions.
C . The user role can create roles.
D . The administrator role is the only predefined role.

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