Apr-2026 FREE Nokia 4A0-D01 PRACTICE QUESTIONS AND ANSWERS UPDATES [Q17-Q37]

Apr-2026 FREE Nokia 4A0-D01 PRACTICE QUESTIONS AND ANSWERS UPDATES

DEMO FREE BEFORE YOU BUY 4A0-D01 DUMPS

Nokia 4A0-D01 Exam Syllabus Topics:

Topic	Details
Topic 1	SR Linux Configuration and Routing: This section of the exam measures skills of a Network Automation Specialist and focuses on configuring and managing SR Linux systems. It examines the YANG-driven CLI, JSON output, environment variables, and static and dynamic routing. Learners also explore BGP, ECMP, IP-VRF, MAC-VRF, and the use of VXLAN with EVPN to implement both Layer 2 and Layer 3 overlays, including symmetric and asymmetric models.
Topic 2	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 3	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 4	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.

 

NEW QUESTION # 17
Which of the following is NOT a function of Nokia's SR Linux application manager?

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

Answer: D

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 # 18
Which of the following is NOT a function of Nokia's SR Linux application manager?

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

Answer: D

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 # 19
Based on the exhibit output, what CLI command can be used to display the contents of "bgp-log" in Nokia's SR Linux?

• A. show system logging buffer bgp-log
• B. info system logging file bgp-log
• C. info system logging buffer bgp-log
• D. show system logging file bgp-log

Answer: D

Explanation:
The "bgp-log" is defined as a log file in the configuration, so the correct command to display its contents is show system logging file bgp-log.

NEW QUESTION # 20
Which of the following statements about configuration checkpoints in Nokia SR Linux is FALSE?

• A. Checkpoint 0 is always the oldest checkpoint.
• B. The current running configuration can be saved as a JSON-formatted checkpoint file.
• C. The operator can revert to any existing checkpoint.
• D. The operator can generate a new checkpoint when committing configuration changes.

Answer: A

Explanation:
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.

NEW QUESTION # 21
Based on the exhibit output, which of the following is NOT the reason the user runs the "baseline diff" command?

• A. User admin wants to check if there are differences between the current running config and their baseline datastore.
• B. Another user has committed changes.
• C. User admin notices that "!" appears in the CLI prompt.
• 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 # 22
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 the Web or FTP server to provide the RPM packages and any necessary images
• C. Uses Nokia's Fabric Services System to deploy the digital sandbox automatically
• D. Uses the DHCP server to provide the IP address and default gateway

Answer: C

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 # 23
Which of the following is NOT one of the reasons why BGP is used as the routing protocol in the data center?

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

Answer: C

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 # 24
Examine the exhibit. Which of the following statements is TRUE?

• A. A recursive lookup is performed to resolve 10.2.1.0 to use 10.1.1.0.
• B. A recursive lookup is performed to resolve 10.1.1.0 to use 10.2.1.0.
• C. The next-hop group for this static route is configured with two next-hops.
• D. The next-hop selected for this route will be based on the preference value configured for each next-hop.

Answer: C

Explanation:
The static route shows two next-hop IP addresses (10.1.1.0 and 10.2.1.0) listed, indicating that a next-hop group with multiple next-hops is configured for load balancing or redundancy.

NEW QUESTION # 25
Which of the following statements about IP-VRFs in Nokia's SR Linux is FALSE?

• A. An IP-VRF is a Layer 3 network instance.
• B. The router maintains a distinct route table for each IP-VRF instance.
• C. Packets in an IP-VRF are forwarded based on the destination IP address.
• D. Multiple servers can be connected to the same subnet in an IP-VRF.

Answer: D

Explanation:
Multiple servers connected to the same subnet typically reside within the same Layer 2 domain or MAC-VRF. IP-VRFs operate at Layer 3 and segment routing and forwarding by separate routing tables, so multiple servers on the same subnet are not a function of IP-VRF.

NEW QUESTION # 26
Which of the following statements about resilient ECMP load balancing is TRUE?

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

Answer: C

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 # 27
Which of the following statements about the data center's leaf-spine topology (clos network) is FALSE?

• A. Each leaf router is connected to all the spine routers in the cluster.
• B. It provides a consistent path for east-west traffic.
• C. It uses the spanning tree protocol to avoid forwarding loops.
• D. It uses ECMP to distribute traffic across duplicate links.

Answer: C

Explanation:
The leaf-spine (Clos) topology does not use the spanning tree protocol because it relies on equal-cost multipath (ECMP) routing to prevent loops and efficiently utilize all available paths. Spanning tree is typically avoided in modern data center fabrics to enable full bandwidth utilization.

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

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

Answer: A

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 statements about Zero Touch Provisioning (ZTP) is FALSE?

• A. The ZTP process downloads a provisioning script defined in the TLS profile.
• B. ZTP allows a router to become operational in the network without any pre-provisioning.
• C. The ZTP process is managed by the ZTP application in Nokia SR Linux.
• D. The ZTP process relies on a DHCP server for an IP address.

Answer: A

Explanation:
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.

NEW QUESTION # 30
Which of the following statements about the YANG model used in Nokia's SR Linux is FALSE?

• A. All configuration and state information is defined as a YANG model.
• B. The YANG model uses a tree structure with "leafs" as the branches and "containers" as the data components.
• C. The YANG model provides a standardized way for applications to retrieve SR Linux configuration and state information.
• D. The YANG model can be converted into other formats such as JSON or XML.

Answer: B

Explanation:
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.

NEW QUESTION # 31
Which of the following statements about next-hop groups is TRUE?

• A. A next-hop-group can only specify one next-hop for forwarding
• B. CMP destination unreachable message is always sent when blackhole is specified in the next-hop-group.
• C. Multiple static routes can use the same next-hop-group.
• D. The next-hop for a next-hop-group must be a local IP address.

Answer: C

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

NEW QUESTION # 32
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