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>> Certified JN0-106 Questions <<
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NEW QUESTION # 91
You want to automatically back up your Junos device configuration to an external server every time you commit a configuration change. In this scenario, which command would accomplish this task?
Answer: B
Explanation:
Junos OS provides robust automation features for configuration management, specifically through the system archival utility. When an administrator needs to ensure that every successful configuration change is mirrored to an off-box repository for disaster recovery or auditing, the transfer-on-commit statement is the appropriate tool. This command instructs the Junos device to initiate an automated upload process immediately following the validation and activation of a commit command.
To fully implement this, the administrator must also define the archive-sites, which specify the destination URIs (using protocols such as FTP, SCP, or HTTP) and the necessary credentials for the external server.
While transfer-interval can be used to back up configurations on a chronological schedule (e.g., every 60 minutes), transfer-on-commit is superior for tracking specific change events as they happen. This ensures that the external backup is always synchronized with the current active configuration on the device. Once configured, the device handles the background transfer, allowing the administrator to maintain a historical record of configuration states without manual intervention, which is essential for large-scale operational environments.
Reference: Configuration Basics, Managing Configurations, System Archival.
NEW QUESTION # 92
You have configured some interfaces on a Junos device; however, you have not yet committed the configuration. What happens if you issue the rollback 0 command in this scenario?
Answer: C
Explanation:
In Junos OS, issuing the rollback 0 command reverts the candidate configuration to the last committed configuration. If you have made changes to some interfaces but have not committed those changes, using rollback 0 will discard these uncommitted changes, reverting to the state of the configuration at the time of the last commit. This command does not affect system files like messages.log, reboot the device, or load the factory default configuration; it simply undoes uncommitted changes.
NEW QUESTION # 93
You are creating a new user account using a predefined login class on a Junos device. The account should be able to run operational mode commands such as show interfaces and ping, but should not be allowed to change or commit configuration. Which login class should you assign to this user?
Answer: D
Explanation:
The operator login class allows users to execute operational mode commands such as monitoring and troubleshooting commands, while preventing access to configuration mode for making or committing changes.
NEW QUESTION # 94
Which statement accurately describes the Junos candidate configuration?
Answer: C
Explanation:
In the Junos OS architecture, the configuration environment is strictly bifurcated to ensure system stability and integrity. The candidate configuration is a specific database that serves as a staging area, storing all proposed changes made by an administrator during a configuration session before they are finalized. Unlike other network operating systems where changes might take effect immediately upon entry, Junos utilizes this "sandbox" approach where modifications reside only in the candidate database until a commit command is explicitly executed.
Once the commit process is initiated, the Junos OS kernel validates the candidate configuration for syntax errors and logical consistency. If the validation check is successful, the candidate configuration is promoted and becomes the active configuration--the operational state currently running on the device hardware. This separation allows multiple administrators to work on complex changes without impacting live transit traffic or device stability prematurely. If a mistake is identified during the editing process, the candidate configuration can be easily discarded or compared against the active state to identify discrepancies. This workflow is a cornerstone of Junos OS, facilitating a "check-before-apply" methodology that is essential for carrier-grade reliability and minimizing the risk of accidental outages during critical maintenance windows.
NEW QUESTION # 95
Which two tasks would you perform in operational mode? (Choose two.)
Answer: B,C
Explanation:
The Junos Command Line Interface (CLI) is structured into two primary hierarchical modes: operational mode and configuration mode. Operational mode is the default entry point when a user logs into the device, signified by the > prompt. This mode is designed for monitoring the health of the device, troubleshooting network issues, and executing system-level maintenance tasks. Specifically, an administrator uses operational mode to verify the version of Junos OS currently active on the device using the show version command.
Additionally, system-level administrative actions that do not involve modifying the device ' s persistent configuration logic are performed within the operational mode. This includes requesting the system to reboot or halt via the request system hierarchy of commands. In contrast, tasks that involve manipulating the configuration database-such as committing proposed changes or rolling back to a previous configuration version-require the user to transition into configuration mode, indicated by the # prompt. Understanding this distinction is vital for efficient navigation of the Junos CLI; while operational mode provides the tools to observe the system and manage its physical state, configuration mode is reserved for altering the logical parameters and routing policies that govern device behavior. Reference: User Interfaces, CLI Modes, Operational Mode Commands.
NEW QUESTION # 96
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