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Juniper JN0-105 Exam Questions
- Topic 1: Networking Fundamentals: The topic networking fundamentals covers identifying the concepts and functionality of different fundamental elements of networking.
- Topic 2: Junos OS Fundamentals: It covers concepts, benefits, and functionality of the core elements of the Junos OS.
- Topic 3: User Interfaces: This topic delves into identifying the concepts, operation, or functionality of the Junos user interface.
- Topic 4: Configuration Basics: Identification of the main elements for configuring Junos devices is discussed in this topic. Moreover, it describes configuring basic components of a Junos device
- Topic 5: Operational Monitoring and Maintenance: Different methods of monitoring or maintaining Junos devices are identified in this topic. Lastly, it discusses monitoring or maintenance procedures for a Junos device.
- Topic 6: Routing Fundamentals: This topic discusses pointing out basic routing concepts or functionality for Junos devices. Moreover, the topic also describes configuring or monitoring basic routing elements for a Junos device.
- Topic 7: Routing Policy and Firewall Filters: The topic of Routing Policy and Firewall Filters covers routing policy and firewall filters on Junos devices. Furthermore, the topic also deals with routing policies and firewall filters on a Junos device.
Free Juniper JN0-105 Exam Actual Questions
Note: Premium Questions for JN0-105 were last updated On Apr. 24, 2025 (see below)
Which two statements are true about the PFE? (Choose two.)
The Packet Forwarding Engine (PFE) in Juniper Networks devices is the heart of the data plane, handling the actual forwarding of packets based on pre-computed forwarding tables. It provides several critical services to manage and control traffic flow, including policing (to enforce bandwidth limits for certain traffic types), stateless firewall filtering (to permit or deny traffic based on predefined criteria), and Class of Service (CoS) (to prioritize traffic to ensure quality of service for critical applications). The PFE utilizes both Layer 2 (MAC addresses) and Layer 3 (IP addresses) forwarding tables to make intelligent forwarding decisions, ensuring that packets are efficiently routed toward their final destination.
You want to find out the chassis serial number of a Junos device.
Which command would display this information?
The show chassis hardware command in Junos OS displays detailed information about the hardware installed in the device, including the chassis itself. This command provides a list of all hardware components, their serial numbers, part numbers, and version information. When looking for the chassis serial number specifically, this command is the most direct and comprehensive way to retrieve that information, as it includes the serial number of the chassis among the details provided.
What are two functions of the Routing Engine? (Choose two.)
The Routing Engine (RE) in Junos OS has several critical functions, including processing all management traffic (A) and running the Junos operating system (B). The RE handles system management tasks, user interfaces, system services, and routing protocol processes. It does not directly process transit traffic or evaluate firewall filters for transit traffic, as these tasks are handled by the Packet Forwarding Engine (PFE).
You are asked to view the real-time usage statistics for the busiest interfaces on a device running Junos OS.
Which command will achieve this task?
To view real-time usage statistics for the busiest interfaces on a device running Junos OS, the correct command is B, 'monitor interface traffic.' This command provides a dynamic, real-time view of the traffic flowing through the interfaces, allowing administrators to quickly identify and monitor the busiest interfaces on the device.
Which two statements are correct about MAC addresses? (Choose two.)
MAC (Media Access Control) addresses are unique identifiers assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used to identify the physical hardware on a network. In the context of Ethernet switches, the destination MAC address in incoming frames is used to determine the appropriate output port for forwarding the frame towards its final destination. The switch does not change the destination MAC address; it uses the MAC address to make forwarding decisions within the local network segment.
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