Juniper JN0-106 Exam Braindumps, Valid JN0-106 Test Practice

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Juniper JN0-106 Exam Syllabus Topics:

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

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Juniper Junos, Associate (JNCIA-Junos) Sample Questions (Q58-Q63):

NEW QUESTION # 58
Which two protocols use UDP to facilitate speed? (Choose two.)

Answer: A,B


NEW QUESTION # 59

Referring to the exhibit, what would be the next-hop address for the packet destined for the 10.0.0.0/24 network if the ge-0/0/1 interface goes down?

Answer: A

Explanation:
Analyzing the provided exhibit of the inet.0 routing table reveals that the destination network 10.0.0.0/24 currently has two viable paths: a static route with a preference of 5 and an OSPF route with a preference of
10. Both routes are configured to use 10.12.0.1 via the ge-0/0/1.0 interface as their primary next hop. The static route is currently marked with an asterisk (*), indicating it is the active path chosen by the Routing Engine due to its lower preference value.
In the event that the ge-0/0/1 interface transitions to a " down " state, the physical layer failure triggers the immediate invalidation of all routes associated with that link. Consequently, both the specific static and OSPF routes for the 10.0.0.0/24 prefix are purged from the active forwarding table. The Routing Engine must then perform a re-evaluation of the routing table to identify the next best match for any traffic destined for that range. Since there are no other more specific or equally specific routes available for the 10.0.0.0/24 network, the router falls back to the default route (0.0.0.0/0) . As shown in the exhibit, the default route points to the next-hop address 10.23.0.3 via interface ge-0/0/2.0 . Therefore, if the primary interface fails, traffic will be redirected through this secondary gateway.
Reference: Routing Fundamentals, Routing Table Selection, Path Redundancy.


NEW QUESTION # 60
What is the purpose of an ARP packet?

Answer: A

Explanation:
The Address Resolution Protocol (ARP) is a fundamental Layer 2 utility used within the IPv4 suite to resolve a known network-layer (Layer 3) address to its corresponding physical media access control (MAC) or hardware address (Layer 2). In a typical Ethernet environment, when a Junos device needs to forward a packet to a next-hop on a local subnet, the Packet Forwarding Engine (PFE) requires the destination MAC address to properly encapsulate the frame.
The process begins with an ARP Request, which is broadcast to all hosts on the segment asking, " Who owns this IP address? " The host assigned that specific IP responds with an ARP Reply containing its MAC address.
The Junos device then stores this mapping in its ARP cache (viewable via the show arp command) to avoid repeated broadcasts for subsequent packets. This resolution is essential because while IP addresses facilitate end-to-end logical routing, the actual delivery of data across a physical wire or switch fabric relies entirely on hardware addresses. Without successful ARP resolution, the device cannot complete the Layer 2 header, and the traffic will be dropped as " encapsulation failed. " Reference: Networking Fundamentals, Ethernet and Address Resolution Protocol.


NEW QUESTION # 61
A network administrator must set up the initial configuration of the out-of-band management interface on a new Juniper router to ensure management traffic is isolated from the default routing table (inet.0). In this scenario, which configuration step is required to accomplish this task in Junos OS?

Answer: A

Explanation:
The out-of-band management interface (fxp0 or em0) must be assigned an IP address and placed into the dedicated management routing instance using the system management-instance configuration, which isolates management traffic from the default inet.0 routing table.


NEW QUESTION # 62
Which CLI command displays currently active security policies on an SRX device?

Answer: A

Explanation:
The show security policies command displays the configured security policies, including source/destination zones, match criteria, and actions.


NEW QUESTION # 63
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