4A0-D01 Revolutionary Guide To Exam Nokia Dumps
4A0-D01 Free Study Guide! with New Update 37 Exam Questions
NEW QUESTION # 13
Which of the following is NOT how prefixes are typically learned and advertised in a leaf and spine data center?
- A. Each leaf router learns the prefixes of remote servers from other leaf routers directly using eBGP.
- B. Each leaf router advertises the prefixes of its own locally connected servers.
- C. Spine routers advertise learned prefixes to leaf routers directly using eBGP.
- D. Spine routers learn prefixes from leaf routers directly using eBGP.
Answer: A
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 # 14
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. Analyze the overall health of the data center fabric for proactive operations.
- C. Use a fabric intent to build and validate design templates.
- D. Monitor the data center fabric using model-driven telemetry.
Answer: C
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 # 15
Which of the following statements about the data center's leaf-spine topology (clos network) is FALSE?
- A. It uses ECMP to distribute traffic across duplicate links.
- B. It provides a consistent path for east-west traffic.
- C. It uses the spanning tree protocol to avoid forwarding loops.
- D. Each leaf router is connected to all the spine routers in the cluster.
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 # 16
Which of the following is NOT one of the characteristics of Nokia's SR Linux?
- A. It uses mature and stable SNMP protocol to access the command line interface.
- B. It includes a NetOgs development kit that supports the integration of third-party applications.
- C. It uses a modular, state-driven architecture that gives applications efficient access to system information.
- D. It uses an unmodified Linux kernel that simplifies the use of third party applications.
Answer: A
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 # 17
How does Nokia's Fabric Services System use a fabric intent to build the DC switch fabric?
- A. It uses telemetry data to build the configuration files for the DC fabric.
- B. It uses a digital sandbox to build the configuration files for the DC fabric.
- C. It uses a YAML file that defines the intended configuration state of the DC fabric.
- D. It uses a digital sandbox to connect workloads to 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 # 18
Which of the following statements about Nokia's Fabric Services System is FALSE?
- A. Telemetry data is provided in a context that is relevant to the fabric intent.
- 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. Digital sandbox provides notification of performance issues in the data center fabric.
Answer: D
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 # 19
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 a well understood and mature routing protocol.
- C. It is more efficient than link-state protocols like IS-IS and OSPF.
- D. BGP neighbors automatically discover each other.
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 # 20
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. Multiple servers can be connected to the same subnet in an IP-VRF.
- C. The router maintains a distinct route table for each IP-VRF instance.
- D. Packets in an IP-VRF are forwarded based on the destination IP address.
Answer: B
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 # 21
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. Users can switch from one mode to another using the enter command.
- C. The state mode displays the current configuration and operational information.
- D. The show mode uses pre-defined reports to display operational information.
Answer: B
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 # 22
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. User admin is not able to commit their changes.
- C. User admin wants to check if there are differences between the current running config and their baseline datastore.
- D. Another user has committed changes.
Answer: B
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 # 23
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. Uses the DHCP server to provide the IP address and default gateway
- B. Downloads and executes provisioning scripts
- C. Uses Nokia's Fabric Services System to deploy the digital sandbox automatically
- D. Uses the Web or FTP server to provide the RPM packages and any necessary images
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 # 24
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 a well understood and mature routing protocol.
- C. It is more efficient than link-state protocols like IS-IS and OSPF.
- D. BGP neighbors automatically discover each other.
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 # 25
Which of the following statements about the YANG model used in Nokia's SR Linux is FALSE?
- A. The YANG model can be converted into other formats such as JSON or XML.
- B. All configuration and state information is defined as a YANG model.
- C. The YANG model provides a standardized way for applications to retrieve SR Linux configuration and state information.
- D. The YANG model uses a tree structure with "leafs" as the branches and "containers" as the data components.
Answer: D
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 # 26
How are LLDP frames advertised between two Nokia SR Linux routers?
- A. They are routed to the destination node based on the IP VRF forwarding table.
- B. They are forwarded to the destination node based on the MAC VRF table.
- C. They are periodically flooded to the broadcast MAC address on each interface.
- D. They are forwarded to the destination node based on the MAC VRF table.
Answer: D
Explanation:
LLDP frames are periodically sent to a well-known multicast MAC address on each interface to discover directly connected devices.
NEW QUESTION # 27
Which of the following statements about a CPM-filter policer is FALSE?
- A. The system-cpu-policer is hardware-based.
- B. Hierarchical policing of control plane traffic is supported.
- C. The system-cpu-policer acts on the aggregate traffic from all line cards.
- D. CPM-filter entries can use both a distributed-policer and a system-cpu-policer.
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 # 28
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