Free Nov-2025 UPDATED Nokia 4A0-D01 Certification Exam Dumps is Online
Nokia Exam 2025 4A0-D01 Dumps Updated Questions
Nokia 4A0-D01 Exam Syllabus Topics:
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NEW QUESTION # 10
Which of the following statements about configuration checkpoints in Nokia SR Linux is FALSE?
- A. The current running configuration can be saved as a JSON-formatted checkpoint file.
- B. The operator can revert to any existing checkpoint.
- C. Checkpoint 0 is always the oldest checkpoint.
- D. The operator can generate a new checkpoint when committing configuration changes.
Answer: C
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 # 11
Which of the following is NOT one of the reasons why BGP is used as the routing protocol in the data center?
- A. It supports both IPv4 and IPv6.
- B. It is more efficient than link-state protocols like IS-IS and OSPF.
- C. BGP neighbors automatically discover each other.
- D. It is a well understood and mature routing protocol.
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 # 12
Which of the following is NOT how prefixes are typically learned and advertised in a leaf and spine data center?
- A. Spine routers advertise learned prefixes to leaf routers directly using eBGP.
- B. Spine routers learn prefixes from leaf routers directly using eBGP.
- C. Each leaf router learns the prefixes of remote servers from other leaf routers directly using eBGP.
- D. Each leaf router advertises the prefixes of its own locally connected servers.
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 # 13
Which of the following statements about Nokia's Fabric Services System is FALSE?
- A. Digital sandbox provides notification of performance issues in the data center fabric.
- B. Cloud-native design enables easy integration with the customer's environment.
- C. Telemetry data is provided in a context that is relevant to the fabric intent.
- D. Data center fabric configuration is represented as the fabric intent in a declarative YAML format.
Answer: A
Explanation:
The Digital Sandbox in Nokia's Fabric Services System is primarily used for simulation and validation of fabric intent, not for providing notifications of performance issues.
NEW QUESTION # 14
Which of the following is NOT one of the characteristics of Nokia's SR Linux?
- A. It uses a modular, state-driven architecture that gives applications efficient access to system information.
- B. It includes a NetOgs development kit that supports the integration of third-party applications.
- C. It uses mature and stable SNMP protocol to access the command line interface.
- D. It uses an unmodified Linux kernel that simplifies the use of third party applications.
Answer: C
Explanation:
Nokia's SR Linux does not rely on the SNMP protocol for accessing the command line interface; instead, it uses modern, programmable interfaces aligned with its modular architecture.
NEW QUESTION # 15
Which of the following Nokia's SR Linux ACLs is instantiated on all line cards to copy incoming packets to the CPM?
- A. Ingress ACL
- B. Egress ACL
- C. Capture-filter ACL
- D. CPM-filter ACL
Answer: D
Explanation:
The CPM-filter ACL is instantiated on all line cards in Nokia's SR Linux to copy incoming packets to the Control Plane Manager (CPM) for processing.
NEW QUESTION # 16
Which of the following statements about Zero Touch Provisioning (ZTP) is FALSE?
- A. The ZTP process is managed by the ZTP application in Nokia SR Linux.
- B. ZTP allows a router to become operational in the network without any pre-provisioning.
- C. The ZTP process relies on a DHCP server for an IP address.
- D. The ZTP process downloads a provisioning script defined in the TLS profile.
Answer: D
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 # 17
Which of the following statements about Nokia's SR Linux logging is FALSE?
- A. SR Linux logs are handled using facility Iocal6 of the native Linux syslog utility.
- B. SR Linux logs can be saved locally as an encrypted file.
- C. SR Linux supports the use of filters to select log messages.
- D. Logging parameter configuration is translated into the /etc/rsyslog.conf file.
Answer: B
Explanation:
Nokia SR Linux does not natively support saving logs locally as encrypted files. Logs are managed using standard Linux syslog facilities and can be filtered, but encryption of local log files is not a built-in feature.
NEW QUESTION # 18
Which of the following statements about a CPM-filter policer is FALSE?
- A. The system-cpu-policer is hardware-based.
- B. CPM-filter entries can use both a distributed-policer and a system-cpu-policer.
- C. The system-cpu-policer acts on the aggregate traffic from all line cards.
- D. Hierarchical policing of control plane traffic is supported.
Answer: A
Explanation:
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.
NEW QUESTION # 19
Which of the following statements about the CLI modes in Nokia's SR Linux is FALSE?
- A. The running mode is used to make configuration changes.
- B. The state mode displays the current configuration and operational information.
- C. Users can switch from one mode to another using the enter command.
- D. The show mode uses pre-defined reports to display operational information.
Answer: C
Explanation:
In Nokia SR Linux, users switch between CLI modes using specific commands like configure or exit, not an enter command. The enter command is not used for mode switching.
NEW QUESTION # 20
Which of the following statements about a MAC-VRF is FALSE?
- A. Multiple devices can be connected to the same IP subnet using a MAC-VRF.
- B. A MAC-VRF is a Layer 2 network instance.
- C. Bridge table entries contain an exit interface for each destination address.
- D. Packets received in a MAC-VRF are forwarded based on destination IP address.
Answer: D
Explanation:
In a MAC-VRF, packets are forwarded based on Layer 2 information such as destination MAC addresses, not on destination IP addresses.
NEW QUESTION # 21
Which of the following is NOT a valid logging source used in Nokia's SR Linux?
- A. Linux facility + priority
- B. Console
- C. Syslog filter
- D. SR Linux subsystem + priority
Answer: C
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 # 22
How does Nokia's Fabric Services System use a fabric intent to build the DC switch fabric?
- A. It uses a digital sandbox to build the configuration files for the DC fabric.
- B. It uses a digital sandbox to connect workloads to the DC fabric.
- C. It uses a YAML file that defines the intended configuration state of the DC fabric.
- D. It uses telemetry data to build the configuration files for the DC fabric.
Answer: C
Explanation:
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.
NEW QUESTION # 23
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 is not able to commit their changes.
- D. User admin notices that "!" appears in the CLI prompt.
Answer: C
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 # 24
Which of the following statements about resilient ECMP load balancing is TRUE?
- A. A different hash seed is used on downstream routers to ensure that flows are randomly distributed across all eligible router interfaces.
- B. When one of the next-hops fail, only flows currently egressing to that next-hop are impacted.
- C. Hash buckets are used to ensure that flows egressing the same interface on one router use different egress interfaces on downstream routers.
- D. The hash value used to distribute traffic is calculated as a modulo function on specific fields of the packet header.
Answer: B
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 # 25
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