Sep 30, 2025 Reliable Study Materials for 4A0-D01 Exam Success For Sure [Q18-Q36]

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Sep 30, 2025 Reliable Study Materials for 4A0-D01 Exam Success For Sure

100% Latest Most updated 4A0-D01 Questions and Answers

QUESTION 18
Which of the following is NOT one of the reasons why BGP is used as the routing protocol in the data center?

It is more efficient than link-state protocols like IS-IS and OSPF.

BGP neighbors automatically discover each other.

It is a well understood and mature routing protocol.

It supports both IPv4 and IPv6.

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.

QUESTION 19
Which of the following is NOT a function of Nokia’s SR Linux application manager?

It monitors the health of all applications.

It translates the application’s YANG model into protobufs for the IDB.

It manages the SR Linux and customer-defined applications.

It reads the application’s configuration information and starts each application.

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.

QUESTION 20
Based on the exhibit output, what CLI command can be used to display the contents of “bgp-log” in Nokia’s SR Linux?

show system logging buffer bgp-log

show system logging file bgp-log

info system logging buffer bgp-log

info system logging file bgp-log

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.

QUESTION 21
Which of the following is NOT one of the user types supported in Nokia SR Linux?

SR Linux users

Regular Linux OS users

Container users

Remote users

Nokia SR Linux supports SR Linux users, regular Linux OS users, and container users. “Remote users” is not a defined user type within SR Linux user management.

QUESTION 22
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.

QUESTION 23
Which of the following statements about IP-VRFs in Nokia’s SR Linux is FALSE?

An IP-VRF is a Layer 3 network instance.

Packets in an IP-VRF are forwarded based on the destination IP address.

The router maintains a distinct route table for each IP-VRF instance.

Multiple servers can be connected to the same subnet in an IP-VRF.

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.

QUESTION 24
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 25
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?

Uses the DHCP server to provide the IP address and default gateway

Uses the Web or FTP server to provide the RPM packages and any necessary images

Downloads and executes provisioning scripts

Uses Nokia’s Fabric Services System to deploy the digital sandbox automatically

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.

QUESTION 26
Which of the following statements about Nokia’s SR Linux logging is FALSE?

SR Linux logs are handled using facility Iocal6 of the native Linux syslog utility.

SR Linux logs can be saved locally as an encrypted file.

SR Linux supports the use of filters to select log messages.

Logging parameter configuration is translated into the /etc/rsyslog.conf file.

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.

QUESTION 27
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 28
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 29
Which of the following is NOT one of the characteristics of Nokia’s SR Linux?

It uses an unmodified Linux kernel that simplifies the use of third party applications.

It uses a modular, state-driven architecture that gives applications efficient access to system information.

It includes a NetOgs development kit that supports the integration of third-party applications.

It uses mature and stable SNMP protocol to access the command line interface.

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.

QUESTION 30
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 31
Which of the following statements about the CLI modes in Nokia’s SR Linux is FALSE?

The state mode displays the current configuration and operational information.

The show mode uses pre-defined reports to display operational information.

The running mode is used to make configuration changes.

Users can switch from one mode to another using the enter command.

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.

QUESTION 32
Which of the following statements about SR Linux interfaces is FALSE?

Only one management interface is allowed.

Network interfaces are associated with physical ports on the linecards.

The loopback interface is a physical interface directly connected to another interface on the same chassis.

Layer 2 parameters such as MTU are configured at the SR Linux interface level while Layer 3 parameters are configured at the subinterface level.

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.

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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	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 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.