Pass Your Exam Easily! 4A0-D01 Real Question Answers Updated on May 18, 2026
Actual Questions Answers Pass With Real 4A0-D01 Exam Dumps
NEW QUESTION # 21
Which of the following statements about the data center's leaf-spine topology (clos network) is FALSE?
- A. It provides a consistent path for east-west traffic.
- B. It uses the spanning tree protocol to avoid forwarding loops.
- C. It uses ECMP to distribute traffic across duplicate links.
- D. Each leaf router is connected to all the spine routers in the cluster.
Answer: B
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 # 22
How are LLDP frames advertised between two Nokia SR Linux routers?
- A. They are forwarded to the destination node based on the MAC VRF table.
- B. They are periodically flooded to the broadcast MAC address on each interface.
- C. They are forwarded to the destination node based on the MAC VRF table.
- D. They are routed to the destination node based on the IP VRF forwarding table.
Answer: C
Explanation:
LLDP frames are periodically sent to a well-known multicast MAC address on each interface to discover directly connected devices.
NEW QUESTION # 23
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 # 24
Which of the following statements about Nokia's SR Linux logging is FALSE?
- A. SR Linux supports the use of filters to select log messages.
- B. SR Linux logs can be saved locally as an encrypted file.
- C. Logging parameter configuration is translated into the /etc/rsyslog.conf file.
- D. SR Linux logs are handled using facility Iocal6 of the native Linux syslog utility.
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 # 25
Which of the following statements about using BFD with BGP is FALSE?
- A. It can help rapidly detect link failures.
- B. BGP is notified if several BFD control packets are missed.
- C. Using BFD can speed up the BGP advertisement interval.
- D. The BFD endpoints agree on the send/receive rate of control packets.
Answer: C
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 # 26
Which of the following is NOT one of the characteristics of Nokia's SR Linux?
- A. It uses an unmodified Linux kernel that simplifies the use of third party applications.
- 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 a modular, state-driven architecture that gives applications efficient access to system information.
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 # 27
Which of the following statements about the VXLAN tunneling in data centers is FALSE?
- A. VLXAN tunneling is used to provide Layer 2 connectivity between workloads over a common underlay network.
- B. EVPN routes are exchanged between VXLAN tunnel endpoints.
- C. VXLAN tunnel endpoints can be on hypervisors, leaf routers, or datacenter gateways.
- D. Each VXLAN tunnel endpoint is automatically assigned with a unique VNI value.
Answer: D
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 # 28
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. Preference value
- C. Next-hop group
- 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 # 29
Which of the following statements about multi-homing in EVPN is FALSE?
- A. Type 4 Ethernet Segment (ES) EVPN route is used for designated forwarder (DF) election for an ES.
- B. The ES identifier (ESI) uniquely identifies an ES and it is locally significant for a particular leaf.
- C. The Ethernet Segment (ES) identifies a set of links that connects a host to one or more leafs.
- 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 # 30
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. The hash value used to distribute traffic is calculated as a modulo function on specific fields of the packet header.
- C. When one of the next-hops fail, only flows currently egressing to that next-hop are impacted.
- D. Hash buckets are used to ensure that flows egressing the same interface on one router use different egress interfaces on downstream routers.
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 # 31
Which of the following is NOT part of Day 2+ operations with Nokia's Fabric Services System?
- A. Use the digital sandbox to test and validate configuration changes and upgrades.
- B. Use a fabric intent to build and validate design templates.
- C. Analyze the overall health of the data center fabric for proactive operations.
- D. Monitor the data center fabric using model-driven telemetry.
Answer: B
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 # 32
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. The loopback interface is a physical interface directly connected to another interface on the same chassis.
- C. Network interfaces are associated with physical ports on the linecards.
- D. Only one management interface is allowed.
Answer: B
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 # 33
Examine the exhibit. What type of information is NOT included in the IMET route advertised by VTEP1?
- A. VXLAN network identifier (VNI)
- B. IP address of VTEP1
- C. Flooding list
- D. Route distinguisher of VTEP1's MAC-VRF
Answer: D
Explanation:
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.
NEW QUESTION # 34
Which of the following is NOT a valid logging source used in Nokia's SR Linux?
- A. SR Linux subsystem + priority
- B. Linux facility + priority
- C. Console
- D. Syslog filter
Answer: D
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 # 35
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. Data center fabric configuration is represented as the fabric intent in a declarative YAML format.
- D. Telemetry data is provided in a context that is relevant to the fabric intent.
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 # 36
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