Juniper JN0-106 Exam Topics Pdf & Free JN0-106 Brain Dumps

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Juniper JN0-106 Exam Syllabus Topics:

SectionObjectives
Topic 1: Operational Monitoring and Maintenance- Monitoring and Troubleshooting
  • 1. Root password recovery
  • 2. Ping and traceroute utilities
  • 3. Interface statistics and errors
  • 4. Junos OS installation and upgrades
  • 5. Show and monitor commands
Topic 2: Routing Policy and Firewall Filters- Policy Control and Packet Filtering
  • 1. Routing policy flow
  • 2. Import and export policies
  • 3. Filter match criteria and actions
  • 4. Policy structure and terms
  • 5. Unicast reverse-path-forwarding (RPF)
  • 6. Firewall filter concepts
Topic 3: Networking Fundamentals- Core Networking Concepts
  • 1. Function of routers and switches
  • 2. Ethernet networks
  • 3. IPv4 and IPv6 addressing
  • 4. Class of Service (CoS)
  • 5. Collision domains and broadcast domains
  • 6. Longest match routing
  • 7. Subnetting and supernetting
  • 8. Layer 2 addressing and ARP
Topic 4: User Interfaces and Configuration Basics- CLI and Basic Configuration
  • 1. CLI navigation and help features
  • 2. Interface configuration
  • 3. Commit and rollback operations
  • 4. Configuration hierarchy
  • 5. System configuration basics
Topic 5: Junos OS Fundamentals- Junos Architecture and Operations
  • 1. Control plane and forwarding plane
  • 2. Routing Engine and Packet Forwarding Engine
  • 3. Software architecture
  • 4. CLI operational and configuration modes
  • 5. Transit traffic processing
Topic 6: Routing Fundamentals- Routing Concepts and Configuration
  • 1. Routing instances
  • 2. Route preference
  • 3. Routing and forwarding tables
  • 4. Traffic forwarding concepts
  • 5. Static routing
  • 6. Dynamic routing protocol concepts

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Juniper Junos, Associate (JNCIA-Junos) Sample Questions (Q100-Q105):

NEW QUESTION # 100
Which two statements are true about the Junos OS? (Choose two.)

Answer: B,D

Explanation:
In Junos OS, as with many network operating systems, the control plane is responsible for processes that determine how to route traffic. This includes maintaining routing tables, which store information about network paths and protocols. Therefore, routing tables are indeed stored in the control plane. Exception traffic refers to packets that cannot be processed by the normal fast-path processing of the Packet Forwarding Engine (PFE) in the forwarding plane, and thus are sent to the control plane for further processing. This might include packets destined for the router itself, packets that need to be fragmented, or packets that match certain firewall filter criteria, among other reasons. Routing tables are not stored in the forwarding plane. However, the forwarding plane contains the forwarding table (sometimes referred to as the forwarding information base or FIB), which is a distilled version of the routing table optimized for fast packet forwarding. The forwarding plane uses this information to perform the actual transfer of packets across the network device interfaces.


NEW QUESTION # 101
You must add a large hierarchical configuration to your Junos device. You also want to completely replace the existing candidate configuration with a new configuration file. Which command would allow you to accomplish these tasks?

Answer: C

Explanation:
The load override terminal command replaces the entire candidate configuration with the new configuration being entered, making it suitable for loading a large hierarchical configuration and discarding the existing one.


NEW QUESTION # 102
Which two tasks are performed by the Routing Engine in a Junos device? (Choose two.)

Answer: B,D

Explanation:
The Routing Engine (RE) functions as the centralized processor and administrative core of any Junos OS-based platform. Its primary responsibility involves the execution and maintenance of the control plane, which includes running all active routing protocols such as OSPF, BGP, and IS- IS. Through these protocols, the RE exchanges topology information with neighboring routers, builds the Routing Information Base (RIB), and calculates the optimal paths for traffic. Once these paths are determined, the RE distributes the resulting Forwarding Information Base (FIB) to the Packet Forwarding Engine (PFE) for hardware-level execution.
In addition to its protocol duties, the Routing Engine manages the device configuration and the overall system environment. This includes providing the user interface (CLI or J-Web), managing the candidate and active configuration databases, and handling the commit process. While the PFE is specifically designed to forward transit traffic and evaluate that traffic against firewall filters at line rate, the RE focuses on the higher-level logic and management tasks. This architectural separation ensures that management functions--such as a complex configuration commit or a protocol re-convergence event--do not degrade the performance of the data plane, allowing the device to continue forwarding user traffic without interruption.


NEW QUESTION # 103
Which command would you use to return to the top level of the configuration hierarchy without exiting configuration mode?

Answer: B

Explanation:
The top command immediately moves the user to the top of the configuration hierarchy while remaining in configuration mode.


NEW QUESTION # 104
Which two tasks are performed by the Routing Engine in a Junos device? (Choose two.)

Answer: B,D

Explanation:
The Routing Engine (RE) functions as the centralized processor and administrative core of any Junos OS- based platform. Its primary responsibility involves the execution and maintenance of the control plane, which includes running all active routing protocols such as OSPF, BGP, and IS-IS. Through these protocols, the RE exchanges topology information with neighboring routers, builds the Routing Information Base (RIB), and calculates the optimal paths for traffic. Once these paths are determined, the RE distributes the resulting Forwarding Information Base (FIB) to the Packet Forwarding Engine (PFE) for hardware-level execution.
In addition to its protocol duties, the Routing Engine manages the device configuration and the overall system environment. This includes providing the user interface (CLI or J-Web), managing the candidate and active configuration databases, and handling the commit process. While the PFE is specifically designed to forward transit traffic and evaluate that traffic against firewall filters at line rate, the RE focuses on the higher-level logic and management tasks. This architectural separation ensures that management functions-such as a complex configuration commit or a protocol re-convergence event-do not degrade the performance of the data plane, allowing the device to continue forwarding user traffic without interruption. Reference: Junos OS Fundamentals, Routing Engine Functions, Management and Control Planes.


NEW QUESTION # 105
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