JN0-106 Exam Experience | JN0-106 Exam

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Juniper JN0-106 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: User Interfaces15%- Other management interfaces
  • 1. NETCONF, SSH and out-of-band management
  • 2. J-Web GUI overview
- Command Line Interface (CLI)
  • 1. Operational and configuration modes
  • 2. Command syntax, help and filtering
Topic 2: Networking Fundamentals15%- Networking concepts and models
  • 1. Collision and broadcast domains
  • 2. TCP/IP suite and protocol functions
- IP addressing and subnetting
  • 1. Subnetting, supernetting and route summarization
  • 2. IPv4 and IPv6 addressing
- Ethernet and switching fundamentals
  • 1. MAC addressing and frame processing
  • 2. Switching operations and VLAN concepts
Topic 3: Routing Fundamentals10%- Routing concepts
  • 1. Longest match routing and administrative distance
  • 2. Routing tables and route sources
- Static and dynamic routing
  • 1. Static routes and qualified next hops
  • 2. OSPF, RIP and BGP basics
Topic 4: Operational Monitoring and Maintenance15%- System maintenance
  • 1. File management and storage monitoring
  • 2. Password recovery and system recovery
- Monitoring commands
  • 1. Logging, tracing and troubleshooting tools
  • 2. Show commands for system, interfaces and routing
Topic 5: Configuration Basics15%- Configuration management
  • 1. Hierarchy structure and configuration modes
  • 2. Candidate, active and factory-default configurations
- Basic system configuration
  • 1. Hostname, domain name and name servers
  • 2. User authentication and permissions
- Commit and rollback operations
  • 1. Rollback and rescue configuration
  • 2. Commit, commit-check, commit-confirmed
Topic 6: Routing Policy and Firewall Filters10%- Firewall filters
  • 1. Filter processing and reverse path forwarding
  • 2. Filter structure, match conditions and actions
- Routing policy
  • 1. Policy application and flow control
  • 2. Policy structure, terms, match conditions and actions
Topic 7: Junos OS Fundamentals20%- Software versions and upgrades
  • 1. Upgrade and downgrade procedures
  • 2. Junos OS release types
- Junos architecture
  • 1. Control and forwarding planes
  • 2. Routing Engine and Packet Forwarding Engine
- Traffic processing
  • 1. Transit and exception traffic flow
  • 2. Packet handling and forwarding logic

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Juniper Junos, Associate (JNCIA-Junos) Sample Questions (Q81-Q86):

NEW QUESTION # 81
Which two functions are performed by the PFE? (Choose two.)

Answer: A,D

Explanation:
The Packet Forwarding Engine forwards transit traffic at high speed and also handles certain exception traffic that requires special forwarding treatment.


NEW QUESTION # 82
You configured your system authentication order using the set authentication-order tacplus radius password command. Which statement is correct in this scenario?

Answer: D

Explanation:
In the scenario where the system authentication order is set to "tacplus radius password," the correct statement is (B). If the TACACS+ and RADIUS servers are unreachable or fail to respond, the system will fall back to using password authentication. This ensures that users can still authenticate using locally stored passwords if external authentication servers are unavailable.


NEW QUESTION # 83
You are asked to configure your device running Junos OS to automatically archive your configuration upon commit. In this scenario, which two methods are supported by the Junos OS?
(Choose two)

Answer: A,B

Explanation:
Junos OS supports several methods for automatically archiving configurations upon commit. The supported methods are:
A). SCP (Secure Copy Protocol): SCP is a secure method for transferring files, including configurations, between devices. It is supported by Junos OS for archiving configurations after each commit.
C). FTP (File Transfer Protocol): FTP can also be used for transferring and archiving files, including configurations, after a commit in Junos OS.


NEW QUESTION # 84
Which two statements are correct regarding Layer 2 network switches? (Choose two.)

Answer: A,D

Explanation:
In the Junos OS architecture and general networking standards, Layer 2 switches are designed to increase network efficiency by segmenting collision domains. Unlike legacy hubs, a switch creates a separate collision domain for each of its physical ports. This micro-segmentation allows for full-duplex communication, effectively eliminating the possibility of collisions on individual links. However, while switches segment collision domains, they maintain a single broadcast domain by default.
When a switch receives a broadcast frame, such as an ARP request, it must ensure the frame reaches all possible destinations within the local segment. Consequently, the switch floods the broadcast traffic out of all ports except the one on which it was received. This flooding behavior, while necessary for protocol discovery, makes Layer 2 networks susceptible to traffic loops. If redundant physical paths exist between switches without a loop-prevention mechanism like the Spanning Tree Protocol (STP), broadcast frames can circulate endlessly, leading to a broadcast storm that consumes all available bandwidth and processor resources on the Routing Engine. Furthermore, switches are highly active learners; they populate their Media Access Control (MAC) tables by observing the source addresses of incoming frames to ensure that subsequent unicast traffic is precisely forwarded rather than flooded. Therefore, understanding the management of broadcast domains and the risks of loops is a core competency for any Junos Associate.
Reference: Networking Fundamentals, Collision and Broadcast Domains, Layer 2 Switching Operations.


NEW QUESTION # 85
When considering routing policies, which two statements are correct? (Choose two.)

Answer: A,B

Explanation:
Routing policies in Junos OS are crucial for controlling route advertisements and path selection.
The correct answers are B and C. An import routing policy for BGP determines which received prefix advertisements are placed in the routing information base (RIB), and policy terms are evaluated from top to bottom, with action taken on the first match found. This sequential evaluation allows for precise control over routing decisions.


NEW QUESTION # 86
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