100% Real & Accurate 4A0-D01 Questions and Answers with Free and Fast Updates [Q20-Q36]

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100% Real & Accurate 4A0-D01 Questions and Answers with Free and Fast Updates

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Nokia 4A0-D01 Exam Syllabus Topics:

Topic	Details
Topic 1	This section of the exam measures skills of a Network Automation Specialist and introduces the principles of Event Driven Automation in SR Linux environments. It covers integration with Kubernetes and explores core use cases such as intent-based automation for fabrics and services, as well as enhanced network observability.
Topic 2	Module 5 – EDA (Event Driven Automation) Introduction
Topic 3	SR Linux User and System Management: This section of the exam measures skills of a Network Automation Specialist and includes managing user roles, TLS configurations for secure communication, and automation features like Zero-Touch Provisioning (ZTP). It covers ZTP setup, configuration processes, and common issues that may arise during deployment.
Topic 4	Nokia DC Fabric Solution: This section of the exam measures skills of a Data Center Network Engineer and covers the architecture and benefits of modern Layer 3 data center networks. It includes an overview of BGP-based routing, VXLAN and EVPN overlays for multi-tenant environments, and key features of the SR Linux operating system. The section also explains how APIs are used for external configuration and introduces the Fabric Services System’s management capabilities.

QUESTION 20
Which of the following statements about a CPM-filter policer is FALSE?

Hierarchical policing of control plane traffic is supported.

The system-cpu-policer is hardware-based.

The system-cpu-policer acts on the aggregate traffic from all line cards.

CPM-filter entries can use both a distributed-policer and a system-cpu-policer.

The system-cpu-policer in Nokia SR Linux is software-based, not hardware-based. It acts on aggregate control plane traffic and supports hierarchical policing with CPM-filter entries using both distributed and system-cpu-policers.

QUESTION 21
Which of the following statements about configuration checkpoints in Nokia SR Linux is FALSE?

Checkpoint 0 is always the oldest checkpoint.

The current running configuration can be saved as a JSON-formatted checkpoint file.

The operator can revert to any existing checkpoint.

The operator can generate a new checkpoint when committing configuration changes.

In Nokia SR Linux, checkpoint numbering is dynamic. The system assigns the lowest available number to the most recent checkpoint, not necessarily “0.” When the number of saved checkpoints exceeds the configured maximum, the oldest checkpoint is removed, and the remaining checkpoints are renumbered accordingly. Therefore, checkpoint “0” is not always the oldest checkpoint.

QUESTION 22
Which of the following statements about the IRB subinterface configuration in Nokia SR Linux is FALSE?

An IP address is configured under the IRB’s subinterface.

An IRB subinterface is configured in an IP-VRF network instance.

One IRB subinterface is configured for each interface within a MAC-VRF network instance.

One IRB subinterface is configured in a MAC-VRF network instance.

In Nokia SR Linux, IRB subinterfaces are configured one per MAC-VRF network instance, not one for each interface within that instance. Multiple IRB subinterfaces per interface are not typical.

QUESTION 23
Examine the exhibit. What type of information is NOT included in the IMET route advertised by VTEP1?

VXLAN network identifier (VNI)

Flooding list

Route distinguisher of VTEP1’s MAC-VRF

IP address of VTEP1

The IMET route includes the VNI, flooding list, and IP address of the originating VTEP, but it does not include the route distinguisher of the VTEP’s MAC-VRF.

QUESTION 24
Which of the following statements about resilient ECMP load balancing is TRUE?

The hash value used to distribute traffic is calculated as a modulo function on specific fields of the packet header.

Hash buckets are used to ensure that flows egressing the same interface on one router use different egress interfaces on downstream routers.

A different hash seed is used on downstream routers to ensure that flows are randomly distributed across all eligible router interfaces.

When one of the next-hops fail, only flows currently egressing to that next-hop are impacted.

In resilient ECMP load balancing, when a next-hop fails, only the flows that were using that specific next-hop are affected and need to be redistributed, minimizing disruption to other flows.

QUESTION 25
Which of the following is NOT part of Day 2+ operations with Nokia’s Fabric Services System?

Monitor the data center fabric using model-driven telemetry.

Analyze the overall health of the data center fabric for proactive operations.

Use the digital sandbox to test and validate configuration changes and upgrades.

Use a fabric intent to build and validate design templates.

Using a fabric intent to build and validate design templates is primarily a Day 0 or Day 1 activity focused on initial fabric deployment and design, not part of Day 2+ operational tasks like monitoring, health analysis, or change validation.

QUESTION 26
Which of the following is NOT how prefixes are typically learned and advertised in a leaf and spine data center?

Spine routers advertise learned prefixes to leaf routers directly using eBGP.

Spine routers learn prefixes from leaf routers directly using eBGP.

Each leaf router advertises the prefixes of its own locally connected servers.

Each leaf router learns the prefixes of remote servers from other leaf routers directly using eBGP.

Leaf routers do not learn prefixes from other leaf routers directly using eBGP; instead, leaf routers learn remote prefixes via spine routers. The spine acts as the route reflector or intermediary between leaf routers.

QUESTION 27
Which of the following is NOT a valid logging source used in Nokia’s SR Linux?

Linux facility + priority

Console

SR Linux subsystem + priority

Syslog filter

“Syslog filter” is not a logging source; it is a mechanism used to filter log messages. Valid logging sources in SR Linux include Linux facility + priority, console, and SR Linux subsystem + priority.

QUESTION 28
Which of the following statements about next-hop groups is TRUE?

The next-hop for a next-hop-group must be a local IP address.

Multiple static routes can use the same next-hop-group.

CMP destination unreachable message is always sent when blackhole is specified in the next-hop-group.

A next-hop-group can only specify one next-hop for forwarding

Multiple static routes can share the same next-hop group, enabling efficient reuse of next-hop definitions for load balancing or redundancy.

QUESTION 29
Based on the exhibit output, which of the following is NOT the reason the user runs the “baseline diff” command?

User admin is not able to commit their changes.

Another user has committed changes.

User admin wants to check if there are differences between the current running config and their baseline datastore.

User admin notices that “!” appears in the CLI prompt.

The “baseline diff” command is used to compare the candidate configuration against the baseline datastore to see changes or conflicts, especially when multiple users are involved or to verify differences. It does not indicate that the user is unable to commit changes.

QUESTION 30
Which of the following statements about Zero Touch Provisioning (ZTP) is FALSE?

The ZTP process downloads a provisioning script defined in the TLS profile.

The ZTP process is managed by the ZTP application in Nokia SR Linux.

The ZTP process relies on a DHCP server for an IP address.

ZTP allows a router to become operational in the network without any pre-provisioning.

The ZTP process downloads a provisioning script typically from a defined URL or server, not from a TLS profile. The TLS profile is used for securing communications but does not define the provisioning script location.

QUESTION 31
A static route is configured in two steps in Nokia’s SR Linux. Which of the following items CANNOT be configured in the static-routes container?

blackhole

IPv4 destination prefix

Preference value

Next-hop group

The static-routes container in Nokia SR Linux does not support configuring a blackhole route directly; it is used to configure destination prefixes, preference values, and next-hop groups for static routing.

QUESTION 32
How does Nokia’s Fabric Services System use a fabric intent to build the DC switch fabric?

It uses a YAML file that defines the intended configuration state of the DC fabric.

It uses a digital sandbox to connect workloads to the DC fabric.

It uses a digital sandbox to build the configuration files for the DC fabric.

It uses telemetry data to build the configuration files for the DC fabric.

Nokia’s Fabric Services System uses a fabric intent defined in a declarative YAML file to specify the desired state of the data center fabric, which is then used to build and configure the fabric accordingly.

QUESTION 33
Which of the following statements about using BFD with BGP is FALSE?

It can help rapidly detect link failures.

The BFD endpoints agree on the send/receive rate of control packets.

BGP is notified if several BFD control packets are missed.

Using BFD can speed up the BGP advertisement interval.

BFD helps detect link failures rapidly and notifies BGP to trigger route updates quickly, but it does not speed up the BGP advertisement interval itself. BGP advertisement intervals are controlled by BGP timers, not by BFD.

QUESTION 34
Which of the following statements about the YANG model used in Nokia’s SR Linux is FALSE?

All configuration and state information is defined as a YANG model.

The YANG model uses a tree structure with “leafs” as the branches and “containers” as the data components.

The YANG model can be converted into other formats such as JSON or XML.

The YANG model provides a standardized way for applications to retrieve SR Linux configuration and state information.

In YANG models, “leafs” are the data nodes (not branches), and “containers” group related data nodes. The statement incorrectly reverses their roles by calling leafs branches and containers data components.

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