매달, 우리는 1000명 이상의 사람들이 시험 준비를 잘하고 시험을 잘 통과할 수 있도록 도와줍니다.
Nokia IP network and Service fundamentals 온라인 연습
최종 업데이트 시간: 2025년09월30일
당신은 온라인 연습 문제를 통해 Alcatel Lucent 4A0-100 시험지식에 대해 자신이 어떻게 알고 있는지 파악한 후 시험 참가 신청 여부를 결정할 수 있다.
시험을 100% 합격하고 시험 준비 시간을 35% 절약하기를 바라며 4A0-100 덤프 (최신 실제 시험 문제)를 사용 선택하여 현재 최신 328개의 시험 문제와 답을 포함하십시오.
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Explanation:
A hub is a physical layer (Layer 1) networking device used to connect multiple Ethernet devices in a network. Unlike switches or routers, hubs do not inspect or process frame headers.
Instead, they perform a simple task:
Receive a signal (electrical or optical) on one port
Replicate that signal identically to all other ports
This means the hub does not examine Layer 2 (MAC addresses) or Layer 3 (IP addresses) and does not perform intelligent forwarding. It merely broadcasts all incoming traffic to every other connected device, often resulting in high collision domains and poor efficiency. Option A describes a repeater, not a hub.
Option C describes a switch (Layer 2 device).
Option D describes a router (Layer 3 device).
Option B is correct: A hub does not inspect headers and replicates traffic blindly.
Reference: Nokia IP Networking Fundamentals Study Guide C Chapter: "Network Devices and OSI Model" CompTIA Network+ and Cisco CCNA foundational guides (for universally accepted hardware behavior)
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Explanation:
In Nokia SR OS, event logging allows the router to report system events, alarms, and operational changes to external systems or users. The valid logging destinations include: SNMP C Used to send traps or informs to SNMP managers.
Syslog C Sends logs to centralized syslog servers, a standard for log management.
NETCONF C Can be used for event notification in model-driven management setups, although it is more frequently used for configuration and state management.
However, BOF (Boot Options File) is not a valid logging destination. The BOF is used to store critical
system boot configurations, such as:
Which image to boot from
Network interface settings
Auto-boot parameters
BOF plays no role in the logging infrastructure.
Reference: Nokia SR OS Fundamentals Guide C Section: “Event Logging”
Nokia SRA Study Guide C Chapter: "Logging and Event Monitoring"
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Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
In the Nokia SR OS CLI, specifically in both classic CLI and MD-CLI, the "?" key is used to display a list of all possible command options at a given point in the CLI, along with a brief description of each option.
This functionality helps the user in command discovery and reduces the chances of syntactical errors by showing only valid options.
The "Tab" key, while helpful, is primarily used for auto-completion and not for displaying detailed descriptions.
"Space bar" is used for command continuation, and "Return" executes the command or moves to the next line.
Correct usage example in classic CLI:
*A:SR1>config>router>interface# ?
- Shows all the valid commands and parameters under interface
Reference: Nokia SRA Study Guide C Chapter: "CLI Fundamentals"
Nokia SR OS Fundamentals Guide C Section: "Using the CLI Help System"
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Explanation:
In Nokia SR OS, the MD-CLI provides multiple configuration edit modes to allow different types of user interaction with the configuration system:
Private mode allows multiple users to create individual configuration candidates, which are then merged with the global candidate during commit.
Global mode enables multiple users to edit the same candidate configuration at the same time, with a shared commit session.
Read-only mode allows the user to view the configuration without making changes.
Exclusive mode restricts access to the global candidate configuration such that only one user at a time can enter and make changes. This prevents conflicts and is useful in environments where strict control over configuration changes is necessary.
Therefore, the correct answer is Exclusive mode, as it exclusively locks access to the global candidate for a single user.
Reference: Nokia SR OS MD-CLI User Guide C Section: "Configuration Edit Modes"
Nokia SRA Study Guide C MD-CLI Configuration Concepts
정답:
Explanation:
The Model-Driven Command Line Interface (MD-CLI) in Nokia SR OS provides a structured and programmatic way to manage configurations. It is based on a transactional model, meaning changes are made in a candidate configuration before being committed to the running configuration.
Let's review each statement:
A. It allows atomic transactions C ✔ True. MD-CLI uses atomic transactions to apply multiple changes at once, ensuring consistency and rollback if a failure occurs.
B. Configuration changes are activated when the running configuration datastore is saved to a file C
❌ False. In MD-CLI, changes are committed to the running datastore when a user issues the commit command, not when saving to a file. Saving to a file is a separate action (e.g., admin save) and does not trigger configuration activation.
C. To achieve transactional configuration, it is necessary to have multiple configuration datastores C ✔ True. MD-CLI uses candidate, running, and operational datastores to implement transaction-based configuration.
D. Multiple users may enter the global configuration mode concurrently C ✔ True. MD-CLI supports multi-user access to global configuration with locking mechanisms to prevent conflicts.
Reference: Nokia SR OS MD-CLI User Guide
Nokia SRA Study Guide C Chapter: "Model-Driven Configuration and Transactions"
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Explanation:
The Nokia 7750 SR architecture separates its operations into control plane and data plane functions. The Data Plane includes hardware components responsible for forwarding traffic at line rate.
These components include:
MDA (Media Dependent Adapter) C interfaces with physical media.
IOM (Input/Output Module) C performs high-speed packet forwarding and processing.
XMA (eXpandable Media Adapter) C extends port capacity and media support.
The Control Plane includes the CPM (Control Processor Module), which is responsible for running routing protocols, managing configuration, system operations, and other control-related functions. The CPM does not participate in data forwarding and is thus not part of the data plane.
Reference: Nokia SRA Study Guide, Chapter: "System Architecture C 7750 SR Components"
Nokia IP Networks and Services Fundamentals C Section: Control and Data Plane Functions in SR Architecture
정답:
Explanation:
A Virtual Private Network (VPN) is designed to provide secure and private communication over a shared or public infrastructure.
Key characteristics of VPNs include:
Traffic Isolation: Each customer's traffic is kept separate from others, ensuring privacy and security.
Shared Infrastructure: Service providers can support multiple VPNs over the same physical infrastructure, optimizing resource utilization.
Customization: VPNs can be tailored to meet the specific requirements of individual customers, including security policies, routing, and quality of service.
However, customer data is not altered as it traverses a VPN. Instead, VPNs employ encryption and tunneling protocols to protect data integrity and confidentiality during transmission. The primary goal is to ensure that data remains unchanged and secure from end to end.
Reference: Nokia IP Networks and Services Study Guide C Chapter on VPN Services
정답:
Explanation:
The Link layer, also known as the Data Link layer in the OSI model, is responsible for encapsulating packets from the Network layer into frames suitable for transmission over the physical medium. This process includes adding headers and trailers to the packet to create a frame, which contains necessary information for error detection, addressing, and control.
According to the OSI model, the Data Link layer serves as the intermediary between the Network
layer and the Physical layer. It ensures that data is packaged into frames and manages the access to
the physical transmission medium.
Option A correctly describes this function.
Option B pertains to the Network layer, which is responsible for encapsulating data into IP datagrams and determining the routing of these datagrams across networks.
Option C relates to the Transport layer, which handles the encapsulation of application data into transport layer segments, such as TCP or UDP messages.
Option D is a function of the Physical layer, which deals with the transmission and reception of raw bitstreams over a physical medium, including the timing and synchronization of signals.
Reference: GeeksforGeeks: Data Link Layer in OSI Model
TechTarget: What is the data link layer in the OSI model?
정답:
Explanation:
A layered protocol stack is designed to simplify network communication by separating functionalities into distinct layers. Each layer has a defined role and communicates with the layers directly above and below it.
The main benefits of this model include:
Simplified design and implementation: Developers can focus on one layer without needing to understand the entire system.
Flexibility: New protocols can be developed and inserted at specific layers without redesigning the whole stack.
Interoperability: Standard interfaces allow different systems and vendors to work together. Isolation of functions: Errors and updates can be managed within one layer without impacting others.
However, reducing protocol overhead is not a primary goal of this model. In fact, the encapsulation and interaction between layers can sometimes introduce extra overhead. This overhead is a trade-off accepted to gain the other benefits listed above.
Reference: Nokia IP Networking Fundamentals Study Guide C Chapter 2: "Layered Protocol
Architectures", Section: "Benefits and Goals of Layered Models"
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