[Feb 09, 2026] New Updated 4A0-D01 Exam Questions 2026 [Q21-Q37]

[Feb 09, 2026] New Updated 4A0-D01 Exam Questions 2026

Updated Free Nokia 4A0-D01 Test Engine Questions with 37 Q&As

Nokia 4A0-D01 Exam Syllabus Topics:

Topic	Details
Topic 1	SR Linux Logging, Monitoring, and Filtering: This section of the exam measures skills of a Data Center Network Engineer and addresses how to implement logging, monitoring, and traffic filtering in SR Linux. It explains log file usage, ACL types, CPM filtering, and packet capture filters. Configuration tasks involve applying ACLs and monitoring network activity using capture tools.
Topic 2	Module 5 – EDA (Event Driven Automation) Introduction
Topic 3	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.
Topic 4	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 5	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.

 

NEW QUESTION # 21
When autoboot flag is set in grub.cfg, which of the following is NOT performed as part of the Zero Touch Provisioning (ZTP) autoboot process?

• A. Downloads and executes provisioning scripts
• B. Uses Nokia's Fabric Services System to deploy the digital sandbox automatically
• C. Uses the DHCP server to provide the IP address and default gateway
• D. Uses the Web or FTP server to provide the RPM packages and any necessary images

Answer: B

Explanation:
The ZTP autoboot process does not automatically use Nokia's Fabric Services System to deploy the digital sandbox; it focuses on network boot, DHCP IP assignment, and downloading/executing provisioning scripts from web or FTP servers.

NEW QUESTION # 22
Which of the following statements about multi-homing in EVPN is FALSE?

• A. The Ethernet Segment (ES) identifies a set of links that connects a host to one or more leafs.
• B. The ES identifier (ESI) uniquely identifies an ES and it is locally significant for a particular leaf.
• C. Type 4 Ethernet Segment (ES) EVPN route is used for designated forwarder (DF) election for an ES.
• D. Type 1 Ethernet Auto-Discovery (A-D) EVPN route is used to support EVPN multi-homing.

Answer: B

Explanation:
The Ethernet Segment Identifier (ESI) uniquely identifies an Ethernet Segment (ES) globally across the EVPN domain, not just locally for a particular leaf.

NEW QUESTION # 23
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?

• A. blackhole
• B. Next-hop group
• C. Preference value
• D. IPv4 destination prefix

Answer: A

Explanation:
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.

NEW QUESTION # 24
Which of the following is NOT a function of Nokia's SR Linux application manager?

• A. It monitors the health of all applications.
• B. It translates the application's YANG model into protobufs for the IDB.
• C. It manages the SR Linux and customer-defined applications.
• D. It reads the application's configuration information and starts each application.

Answer: B

Explanation:
The SR Linux application manager does not perform the function of translating an application's YANG model into protobufs for the Interface DataBase (IDB). Its primary roles are managing applications, reading their configuration, and monitoring their health.

NEW QUESTION # 25
Based on the exhibit output, which of the following is NOT the reason the user runs the "baseline diff" command?

• A. User admin notices that "!" appears in the CLI prompt.
• B. Another user has committed changes.
• C. User admin wants to check if there are differences between the current running config and their baseline datastore.
• D. User admin is not able to commit their changes.

Answer: D

Explanation:
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.

NEW QUESTION # 26
Which of the following statements about the VXLAN tunneling in data centers is FALSE?

• A. EVPN routes are exchanged between VXLAN tunnel endpoints.
• B. VXLAN tunnel endpoints can be on hypervisors, leaf routers, or datacenter gateways.
• C. Each VXLAN tunnel endpoint is automatically assigned with a unique VNI value.
• D. VLXAN tunneling is used to provide Layer 2 connectivity between workloads over a common underlay network.

Answer: C

Explanation:
VXLAN tunnel endpoints (VTEPs) are configured with VNI (VXLAN Network Identifier) values, but these VNIs are not automatically assigned; they must be explicitly configured to define Layer 2 segments.

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

• A. Console
• B. Syslog filter
• C. SR Linux subsystem + priority
• D. Linux facility + priority

Answer: B

Explanation:
"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.

NEW QUESTION # 28
Which of the following statements about SR Linux interfaces is FALSE?

• A. Layer 2 parameters such as MTU are configured at the SR Linux interface level while Layer 3 parameters are configured at the subinterface level.
• B. Only one management interface is allowed.
• C. Network interfaces are associated with physical ports on the linecards.
• D. The loopback interface is a physical interface directly connected to another interface on the same chassis.

Answer: D

Explanation:
The loopback interface in SR Linux is a logical, virtual interface used for management and routing purposes; it is not a physical interface directly connected to another interface on the same chassis.

NEW QUESTION # 29
Which of the following is NOT how prefixes are typically learned and advertised in a leaf and spine data center?

• A. Each leaf router advertises the prefixes of its own locally connected servers.
• B. Spine routers advertise learned prefixes to leaf routers directly using eBGP.
• C. Each leaf router learns the prefixes of remote servers from other leaf routers directly using eBGP.
• D. Spine routers learn prefixes from leaf routers directly using eBGP.

Answer: C

Explanation:
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.

NEW QUESTION # 30
Which of the following statements about resilient ECMP load balancing is TRUE?

• A. When one of the next-hops fail, only flows currently egressing to that next-hop are impacted.
• B. The hash value used to distribute traffic is calculated as a modulo function on specific fields of the packet header.
• C. A different hash seed is used on downstream routers to ensure that flows are randomly distributed across all eligible router interfaces.
• D. Hash buckets are used to ensure that flows egressing the same interface on one router use different egress interfaces on downstream routers.

Answer: A

Explanation:
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.

NEW QUESTION # 31
Which of the following statements about using BFD with BGP is FALSE?

• A. Using BFD can speed up the BGP advertisement interval.
• B. It can help rapidly detect link failures.
• C. BGP is notified if several BFD control packets are missed.
• D. The BFD endpoints agree on the send/receive rate of control packets.

Answer: A

Explanation:
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.

NEW QUESTION # 32
Which of the following is NOT part of Day 2+ operations with Nokia's Fabric Services System?

• A. Use a fabric intent to build and validate design templates.
• B. Use the digital sandbox to test and validate configuration changes and upgrades.
• C. Analyze the overall health of the data center fabric for proactive operations.
• D. Monitor the data center fabric using model-driven telemetry.

Answer: A

Explanation:
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.

NEW QUESTION # 33
Which of the following is NOT one of the reasons why BGP is used as the routing protocol in the data center?

• A. It is a well understood and mature routing protocol.
• B. It is more efficient than link-state protocols like IS-IS and OSPF.
• C. It supports both IPv4 and IPv6.
• D. BGP neighbors automatically discover each other.

Answer: B

Explanation:
BGP is not chosen because it is more efficient than link-state protocols; in fact, link-state protocols like IS-IS and OSPF generally provide faster convergence and more efficient route calculation. BGP is used in data centers mainly because it is mature, well understood, supports both IPv4 and IPv6, and offers flexible policy control.

NEW QUESTION # 34
Which of the following is NOT a function of Nokia's SR Linux application manager?

• A. It monitors the health of all applications.
• B. It translates the application's YANG model into protobufs for the IDB.
• C. It manages the SR Linux and customer-defined applications.
• D. It reads the application's configuration information and starts each application.

Answer: B

Explanation:
The SR Linux application manager does not perform the function of translating an application's YANG model into protobufs for the Interface DataBase (IDB). Its primary roles are managing applications, reading their configuration, and monitoring their health.

NEW QUESTION # 35
Which of the following statements about the MAC table shown in the exhibit output is FALSE?

• A. [interface ethernet-1/10 is configured with the MAC address 00:25:BA:00:00:10.
• B. Mac-duplication detection is enabled in mac-vrf-1.
• C. The MAC address 00:25: BA:00:00:10 is learnt on more than one interface.
• D. The MAC re-learning rate has exceeded the threshold within the specified time frame.

Answer: C

Explanation:
The MAC address 00:25:BA:00:00:10 is listed as "duplicate," but it appears only once associated with interface ethernet-1/10. Therefore, it is not learned on more than one interface.

NEW QUESTION # 36
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The Best Nokia Certified Data Center Fabric Professional 4A0-D01 Professional Exam Questions: https://drive.google.com/open?id=1nIfA5mbVpIkfdYohNWZvDVGuKLv0omv1