Juniper JN0-104 Exam Practice Questions (P. 3)

GPT-4o - Answer

Unicast Reverse Path Forwarding (RPF) operates by validating if the source of a received packet matches the routing table's expected path. If an interface receives a packet where the source IP's most optimal route points back to the same interface, this usually suggests IP spoofing – a discrepancy where IPs are falsely portrayed to bypass security measures. Given that the correct interface, ge-0/0/1.0, is both the receiver and designated next hop for the source IP 10.10.10.10, the RPF checks fail, leading to the packet being discarded to prevent potential security threats like spoofing.

GPT-4o - Answer

The prompt displayed in the command-line interface [edit] signifies that the system is in CLI configuration mode. In this mode, you are capable of viewing and making changes directly to the device's configuration. This becomes particularly relevant when you are tasked with making real-time adjustments to various elements of the network setup, suggesting the ability to edit configurations as needed. Thus, option C, configuration mode, is indeed the right choice in this scenario, confirming both the question setup and the user comment breakdown.

GPT-4o - Answer

In configuring a non-root user in Junos OS, the "class" attribute is crucial as it designates the user's permissions and access level within the system. It's a mandatory field that has to be specified at the time of user creation, defining either a system-defined or user-defined class to correctly configure system access and roles. Although some attributes like "uid" might be automatically assigned by the system, the "class" is essential and needs explicit definition, ensuring configured users have the correct role and privileges. Always verify attribute requirements for configuration to avoid issues during commit operations.

GPT-4o - Answer

Correctly enabling configuration archival in Junos OS entails setting backups to occur both when a user commits changes and at specified time intervals. Commit-triggered backups capture configuration changes immediately, providing a safeguard against human errors during modifications. Time-based backups offer snapshots at regular intervals, creating a series of historical versions useful for audits or system recoveries, ensuring compliance, and maintaining system integrity over time. This dual backup approach balances real-time updates with periodic reviews, optimizing configuration management and system reliability.