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Nokia 4A0-D01 Exam Syllabus Topics:
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NEW QUESTION # 12
Which of the following is NOT a function of Nokia's SR Linux application manager?
- A. It manages the SR Linux and customer-defined applications.
- B. It reads the application's configuration information and starts each application.
- C. It monitors the health of all 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 # 13
Which of the following statements about the VXLAN tunneling in data centers is FALSE?
- A. Each VXLAN tunnel endpoint is automatically assigned with a unique VNI value.
- B. VLXAN tunneling is used to provide Layer 2 connectivity between workloads over a common underlay network.
- C. EVPN routes are exchanged between VXLAN tunnel endpoints.
- D. VXLAN tunnel endpoints can be on hypervisors, leaf routers, or datacenter gateways.
Answer: A
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 # 14
Which of the following statements about the YANG model used in Nokia's SR Linux is FALSE?
- A. The YANG model provides a standardized way for applications to retrieve SR Linux configuration and state information.
- B. All configuration and state information is defined as a YANG model.
- C. The YANG model uses a tree structure with "leafs" as the branches and "containers" as the data components.
- D. The YANG model can be converted into other formats such as JSON or XML.
Answer: C
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 # 15
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. User admin is not able to commit their changes.
- C. Another user has committed changes.
- D. User admin notices that "!" appears in the CLI prompt.
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 # 16
Which of the following statements about Zero Touch Provisioning (ZTP) is FALSE?
- A. ZTP allows a router to become operational in the network without any pre-provisioning.
- B. The ZTP process is managed by the ZTP application in Nokia SR Linux.
- C. The ZTP process downloads a provisioning script defined in the TLS profile.
- D. The ZTP process relies on a DHCP server for an IP address.
Answer: C
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 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. Each leaf router advertises the prefixes of its own locally connected servers.
- C. Each leaf router learns the prefixes of remote servers from other leaf routers directly using eBGP.
- D. Spine routers learn prefixes from leaf routers directly using eBGP.
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 # 18
Which of the following statements about the CLI modes in Nokia's SR Linux is FALSE?
- A. Users can switch from one mode to another using the enter command.
- B. The state mode displays the current configuration and operational information.
- C. The show mode uses pre-defined reports to display operational information.
- D. The running mode is used to make configuration changes.
Answer: A
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 # 19
Which of the following statements about the IRB subinterface configuration in Nokia SR Linux is FALSE?
- A. One IRB subinterface is configured in a MAC-VRF network instance.
- B. One IRB subinterface is configured for each interface within a MAC-VRF network instance.
- C. An IP address is configured under the IRB's subinterface.
- D. An IRB subinterface is configured in an IP-VRF network instance.
Answer: B
Explanation:
In Nokia SR Linux, IRB subinterfaces are configured one per MAC-VRF network instance, not one for each interface within that instance. Multiple IRB subinterfaces per interface are not typical.
NEW QUESTION # 20
Examine the exhibit. Which of the following statements is TRUE?
- A. The next-hop selected for this route will be based on the preference value configured for each next-hop.
- B. The next-hop group for this static route is configured with two next-hops.
- C. A recursive lookup is performed to resolve 10.1.1.0 to use 10.2.1.0.
- D. A recursive lookup is performed to resolve 10.2.1.0 to use 10.1.1.0.
Answer: B
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 # 21
Which of the following statements about a CPM-filter policer is FALSE?
- A. CPM-filter entries can use both a distributed-policer and a system-cpu-policer.
- B. The system-cpu-policer acts on the aggregate traffic from all line cards.
- C. Hierarchical policing of control plane traffic is supported.
- D. The system-cpu-policer is hardware-based.
Answer: D
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 # 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 forwarded to the destination node based on the MAC VRF table.
- C. They are routed to the destination node based on the IP VRF forwarding table.
- D. They are periodically flooded to the broadcast MAC address on each interface.
Answer: B
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 Nokia's SR Linux ACLs is instantiated on all line cards to copy incoming packets to the CPM?
- A. Ingress ACL
- B. CPM-filter ACL
- C. Egress ACL
- D. Capture-filter ACL
Answer: B
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 # 24
Examine the exhibit. What type of information is NOT included in the IMET route advertised by VTEP1?
- A. VXLAN network identifier (VNI)
- B. Route distinguisher of VTEP1's MAC-VRF
- C. Flooding list
- D. IP address of VTEP1
Answer: B
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 # 25
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 is more efficient than link-state protocols like IS-IS and OSPF.
- C. It supports both IPv4 and IPv6.
- 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 # 26
Which of the following is NOT one of the user types supported in Nokia SR Linux?
- A. Container users
- B. SR Linux users
- C. Regular Linux OS users
- D. Remote users
Answer: D
Explanation:
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.
NEW QUESTION # 27
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