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| Section | Objectives |
|---|---|
| EVPN-VXLAN Technologies | - VXLAN data plane encapsulation - EVPN control plane fundamentals - EVPN Type 2 and Type 5 routes |
| Data Center Routing Protocols | - BGP in EVPN-based fabrics - OSPF and IS-IS in data center environments - Underlay vs overlay network design |
| Data Center Architecture Fundamentals | - Layer 2 and Layer 3 data center fabric concepts - Redundancy and high availability principles - Spine-leaf (Clos) architecture design |
| Automation and Programmability | - Junos automation basics (scripts, commit scripts) - Network configuration consistency and automation concepts |
| Operations and Troubleshooting | - Troubleshooting routing and switching issues - Monitoring and verifying EVPN-VXLAN fabrics |
| Junos Data Center Switching | - QFX switch configuration and operation - VLANs, trunking, and bridging concepts - Spanning Tree and alternatives in DC designs |
>> Valid JN0-481 Exam Questions <<
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NEW QUESTION # 51
You want to apply a configlet to a specific device using Juniper Apstra. Which two parameters would be used to accomplish this task? (Choose two.)
Answer: C,D
Explanation:
To apply a configlet to a specific device using Juniper Apstra, you need to specify the device's hostname and tags. The hostname is the unique identifier of the device in the Apstra system, and the tags are the labels that you can assign to the device to group it with other devices that share the same characteristics. You can use the hostname and tags to filter the devices that you want to apply the configlet to in the blueprint catalog.
NEW QUESTION # 52
You staged several changes to your Juniper Apstra blueprint but have not committed them.
In this scenario, what is the effect of selecting Revert?
Answer: A
Explanation:
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.
NEW QUESTION # 53
You are using Juniper Apstra to design a data center fabric. In this scenario, which object type associates a specific vendor model to a logical device?
Answer: C
Explanation:
Device profiles are objects that associate a specific vendor model to a logical device in Juniper Apstra. Device profiles contain extensive hardware model details, such as form factor, ASIC, CPU, RAM, ECMP limit, and supported features. Device profiles also define how configuration is generated, how telemetry commands are rendered, and how configuration is deployed on a device. Device profiles enable the Apstra system to render and deploy the configuration according to the Apstra Reference Design.
NEW QUESTION # 54
You want to gracefully take a device out of service to perform an OS upgrade. How would you accomplish this task using Juniper Apstra?
Answer: C
Explanation:
In Apstra 5.1, the correct operational method to gracefully remove a switch from service for maintenance is to set its Deploy Mode to Drain. Drain is a day-2 operational control that tells Apstra to adjust intent so the fabric can continue operating while the targeted device is logically taken out of service as much as the design allows. This is especially relevant in EVPN-VXLAN leaf-spine fabrics where taking down a spine or a leaf can disrupt underlay BGP adjacencies and overlay reachability if traffic is not shifted first.
This action is performed from the blueprint's Active view because Drain affects the currently deployed, running fabric state (not a staged design change). Selecting the device under Active and changing Deploy Mode to Drain initiates the workflow that prepares the device for maintenance by reducing its role in forwarding and/or withdrawing dependent services according to the blueprint's modeled redundancy (for example, shifting server-facing traffic to an MLAG/ESI peer where applicable, or reducing reliance on the device for transit). After the device is drained, an OS upgrade can be performed with less impact, and the device can later be returned to service by switching Deploy Mode back to Deploy and committing the change.
The "Upgrade" action is not the deploy-mode mechanism described for graceful removal; the key is Deploy Mode โ Drain from Active, which is explicitly intended for maintenance and decommissioning scenarios.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/task/device-drain.html
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-drain-mode/apstra-drain-mode-guide/topics/concept/apstra-drain-mode-activate-or-disable-drain.html
NEW QUESTION # 55
You are working with a three-stage IP fabric using EBGP for peering. In this scenario, which two actions are required to implement ECMP? (Choose two.)
Answer: A,B
Explanation:
To implement ECMP in IP fabric using EBGP, you need to enable BGP to install multiple equal- cost paths in the routing table and to advertise them to the peers.
NEW QUESTION # 56
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