[Aug 03, 2026] JN0-106 PDF Recently Updated Questions Dumps to Improve Exam Score
JN0-106 Dumps Full Questions with Free PDF Questions to Pass
Juniper JN0-106 Exam Syllabus Topics:
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NEW QUESTION # 111
You need to recover the root password on a Junos router without losing the current configuration settings. Which three statements describe what you should perform in this scenario? (Choose three.)
- A. Use a console connection to reboot the device.
- B. Enter and commit the new root password.
- C. Upgrade the Junos OS to the latest version.
- D. Hit the space bar and enter recovery when prompted.
- E. Load the factory-default configuration.
Answer: A,B,D
Explanation:
To recover the root password on a Junos router without losing the configuration, you should (A) enter and commit the new root password once you have gained access to the system, (D) hit the space bar to interrupt the boot process and enter recovery mode when prompted during the boot process, and (E) use a console connection to reboot the device and access the bootloader prompt. These steps allow you to reset the root password while preserving the existing configuration.
NEW QUESTION # 112
Which two statements about route preference in Junos OS are correct? (Choose two.)
- A. Route preference determines the forwarding table size.
- B. Route preference is considered after evaluating the longest prefix match.
- C. Higher route preference values indicate higher priority.
- D. Lower route preference values indicate higher priority.
Answer: B,D
Explanation:
In Junos OS, route preference (often referred to as administrative distance in other operating systems) is the mechanism used to select the " best " path when the routing table receives multiple advertisements for the exact same destination prefix from different routing sources. The core rule for preference is that lower values indicate a more preferred or " higher priority " route . For example, a direct route has a default preference of 0, a static route is 5, and OSPF internal routes are 10. If a router learns about the same network from both OSPF and a static entry, it will select the static route because 5 is lower than 10.
Crucially, route preference is only evaluated after the longest prefix match (LPM) has been determined.
LPM is the absolute first step in packet forwarding; the router will always choose the most specific route available (e.g., a /28 over a /24). Only if there are multiple entries for that same /28 does the router look at preference to break the tie. It is a common misconception that a lower preference value can override a more specific prefix; in reality, a /32 route with a preference of 170 (BGP) will always win over a /24 route with a preference of 5 (Static). Understanding this hierarchy is vital for network architects when designing redundant paths and predictable failover behaviors.
NEW QUESTION # 113
What is the purpose of the "commit check" command in Junos OS when working within configuration mode before applying any changes to the system?
- A. Saves configuration permanently
- B. Reboots the device
- C. Checks syntax without applying changes
- D. Deletes candidate configuration
Answer: C
Explanation:
The "commit check" command validates the configuration syntax and logic before applying it. It ensures that errors are caught early without impacting the running configuration. This is especially useful in production environments to prevent service disruptions due to incorrect configurations.
NEW QUESTION # 114
You need to configure interface ge-0/1/2 with an IP address of 172.16.100.1/24. You have accidentally entered 172.16.101.1/24 as shown in the exhibit. Which command should you issue to solve the problem?
- A. [edit] user@router# rollback 2
- B. [edit] user@router# rollback 1
- C. [edit] user@router# rollback rescue
- D. [edit] user@router# rollback 0
Answer: D
Explanation:
In Junos OS, the command rollback 0 is used to revert any uncommitted changes in the candidate configuration, returning the configuration to its state before the uncommitted changes were made. Since the incorrect IP address (172.16.101.1/24) was added but not yet committed, issuing rollback 0 will discard this change, allowing you to re-enter the correct IP address (172.16.100.1/24) without saving the incorrect configuration.
NEW QUESTION # 115
You are creating a new user account using a predefined login class on a Junos device. The account should be able to run operational mode commands such as show interfaces and ping, but should not be allowed to change or commit configuration. Which login class should you assign to this user?
- A. operator
- B. read-only
- C. super-user
- D. maintenance
Answer: A
Explanation:
The operator login class allows users to execute operational mode commands such as monitoring and troubleshooting commands, while preventing access to configuration mode for making or committing changes.
NEW QUESTION # 116
Which three benefits occur when operating an interior gateway protocol (IGP) in an autonomous system (AS)? (Choose three.)
- A. IGPs react very fast to network change.
- B. IGPs learn everything about the subnets and best paths within your network.
- C. IGPs learn prefixes in the global Internet's routing table.
- D. IGPs determine the optimal paths for data transmission.
- E. IGPs automatically distribute static routing information.
Answer: A,B,D
Explanation:
Operating an Interior Gateway Protocol (IGP) within an Autonomous System (AS) provides several benefits, including determining the optimal paths for data transmission (B), reacting quickly to network changes (D), and learning all about the subnets and best paths within the network (E). IGPs are designed to manage routing within a single AS efficiently, adapting to changes and ensuring data is routed through the best available paths.
NEW QUESTION # 117
Which protocol provides secure remote CLI access to a Junos device?
- A. SNMP
- B. FTP
- C. Telnet
- D. SSH
Answer: D
Explanation:
Securing the management plane is a core requirement for any Junos OS deployment. Secure Shell (SSH) is the industry-standard protocol used to provide encrypted, authenticated remote access to the Junos Command Line Interface (CLI). Unlike Telnet, which transmits both administrative credentials and command data in cleartext, SSH utilizes public-key cryptography to establish a secure tunnel, protecting the session from eavesdropping, man-in-the-middle attacks, and unauthorized interception.
In Junos OS, SSH is typically enabled within the [edit system services] hierarchy. Once active, it allows administrators to perform operational and configuration tasks with the assurance that their management traffic remains confidential. Beyond simple terminal access, SSH serves as the transport mechanism for other secure management functions, such as the NETCONF XML management protocol and Secure Copy (SCP) for file transfers. For high-security environments, Junos supports advanced SSH features including key-based authentication, strong cipher suites, and multi-factor authentication integration. Disabling insecure protocols like Telnet and FTP in favor of SSH and SFTP/SCP is a foundational best practice for hardening the Routing Engine against external threats.
NEW QUESTION # 118
Which protocol is responsible for learning an IPv4 neighbor's MAC address?
- A. Network Address Translation (NAT)
- B. Media Access Control Security (MACsec)
- C. Neighbor Discovery Protocol (NDP)
- D. Address Resolution Protocol (ARP)
Answer: D
Explanation:
The Address Resolution Protocol (ARP) is a fundamental protocol used in IPv4 networking to map an IP address to its corresponding MAC (Media Access Control) address. When an IPv4 device wants to communicate with another device on the same local network, it uses ARP to find out the MAC address associated with the target device's IP address. This ensures that IP packets can be encapsulated into Ethernet frames and delivered to the correct hardware address on the local network segment. ARP does not apply to IPv6, where Neighbor Discovery Protocol (NDP) performs a similar function.
NEW QUESTION # 119
You are trying to diagnose packet loss at interface ge-0/0/3. In this scenario, which command would help you view error statistics in real time?
- A. monitor interface traffic
- B. monitor interface ge-0/0/3
- C. show interface ge-0/0/3
- D. show interface terse
Answer: B
Explanation:
The monitor interface ge-0/0/3 command is used in Junos OS to view real-time statistics for a specific interface. This command helps in diagnosing issues like packet loss by displaying real- time updates of traffic and error statistics for the specified interface.
NEW QUESTION # 120
Click the Exhibit button.
Which statement is correct when Router R1 receives a packet from User A destined for User B as shown in the exhibit?
- A. Router R1 replaces the destination MAC address in the packet with the MAC address of User B.
- B. Router R1 leaves the packet unchanged.
- C. Router R1 replaces the destination MAC address in the packet with the MAC address of Router R2.
- D. Router R1 replaces the destination IP address in the packet with the IP address of Router R2.
Answer: C
Explanation:
When R1 forwards the packet to the next hop, it keeps the destination IP address unchanged but rewrites the Layer 2 header for the next link. That means the destination MAC address becomes the MAC address of Router R2.
NEW QUESTION # 121
A network administrator is attempting to route traffic on a Juniper switch to one of three different VLANs: Prod, Test, and Dev. Each VLAN has been assigned a numerical value. In this scenario, what are these numerical values called?
- A. tags
- B. names
- C. defaults
- D. interfaces
Answer: A
Explanation:
In the context of VLANs (Virtual Local Area Networks) on a Juniper switch, the numerical values assigned to each VLAN, such as those for Prod, Test, and Dev, are known as VLAN tags. These tags are part of the 802.1Q VLAN standard, which allows multiple VLANs to coexist on a single physical network. Each tag uniquely identifies the VLAN to which a frame belongs, enabling the switch to segregate and manage traffic based on VLAN membership. This tagging mechanism allows for efficient traffic separation and management, ensuring that devices within one VLAN do not receive traffic intended for another, thus maintaining network security and efficiency.
NEW QUESTION # 122 
Referring to the exhibit, which two statements about IPv6 routing are correct? (Choose two.)
- A. Traffic destined for the 2001:db8:22:108::/64 network is forwarded using the ge-0/0/5.0 interface.
- B. The router cannot forward traffic to remote IPv6 networks.
- C. The router is not learning IPv6 routes from peers.
- D. The router is connected to the 2001:db8:22:107::/64 network.
Answer: B,C
Explanation:
The provided exhibit displays the output of the show route table inet6.0 command, which represents the master routing table for IPv6 unicast traffic in Junos OS. Analysis of the specific route entries reveals that all listed destinations are categorized as either [Direct/0] or [Local/0] . These route types indicate that the table only contains networks physically connected to the router ' s interfaces and the specific IP addresses assigned to those interfaces.
Because there are no routes identified by dynamic protocols (such as OSPFv3, IS-IS, or BGP) or static entries, it is verified that the router is not learning IPv6 routes from any neighbors or peers. Consequently, the routing table lacks reachability information for any non-local or remote IPv6 segments. Without these routes or a configured default gateway (::/0), the router is unable to forward traffic to remote IPv6 networks. Statements C and D are factually incorrect based on the exhibit: the 2001:db8:22:108::/64 network is associated with interface ge-0/0/4.0 (not ge-0/0/5.0), and the 2001:db8:22:107::/64 network is entirely absent from the displayed routing table.
Reference: Routing Fundamentals, IPv6 Implementation, Routing Table Interpretation.
NEW QUESTION # 123
Which two elements are required when defining a security policy on an SRX device? (Choose two.)
- A. An IPsec VPN tunnel
- B. Source and destination zones
- C. A configured routing protocol
- D. Match criteria such as source/destination address and application
Answer: B,D
Explanation:
A security policy requires defining the source and destination zones the policy applies to, along with match criteria (addresses, applications) and an action (permit, deny, or reject).
NEW QUESTION # 124
Which statement correctly describes the separation of control plane and forwarding plane in Junos OS?
- A. The control plane runs on the Routing Engine, and the forwarding plane runs on the Packet Forwarding Engine.
- B. The forwarding plane manages routing protocol adjacencies.
- C. The control plane processes all transit traffic.
- D. The control plane and forwarding plane share the same CPU and memory resources.
Answer: A
Explanation:
Junos OS separates the control plane (Routing Engine) from the forwarding plane (Packet Forwarding Engine), improving stability and performance since a control plane issue does not directly disrupt packet forwarding.
NEW QUESTION # 125
Which two statements are correct about Junos traceoptions? (Choose two.)
- A. Traceoptions cannot be enabled in a production environment.
- B. Traceoption output, by default, is stored in /var/iog/<fiie-name>.
- C. Traceoptions are enabled by default.
- D. Traceoptions are enabled through configuration.
Answer: B,D
Explanation:
Traceoptions in Junos OS are used for detailed debugging and troubleshooting of protocols and processes within the system. They are not enabled by default due to the potential performance impact and volume of data generated. Instead, traceoptions are enabled through specific configuration settings under the relevant protocol or process hierarchy. This allows administrators to target their troubleshooting efforts and control the scope of logging. By default, the output generated by traceoptions is stored in files located in the /var/log directory, with the file name typically specified in the traceoptions configuration. This structured approach to logging and debugging helps in diagnosing complex issues without overwhelming the system or the administrator with irrelevant data.
NEW QUESTION # 126
Which Junos OS command is used to display general information about installed interfaces, including their administrative and link status?
- A. show chassis hardware
- B. show interfaces extensive
- C. show interfaces terse
- D. show configuration interfaces
Answer: C
Explanation:
The show interfaces terse command provides a concise summary of interfaces, including their administrative status (up/down), link status, and any configured IP addresses.
NEW QUESTION # 127
Which two common routing policy actions affect the flow of policy evaluation? (Choose two.)
- A. next hop
- B. community
- C. next policy
- D. next term
Answer: C,D
Explanation:
In Junos OS routing policy evaluation, "next policy" (A) and "next term" (C) are common actions that affect the flow of policy evaluation. "Next policy" directs the evaluation to the next policy in the sequence, whereas "next term" moves the evaluation to the next term within the current policy, allowing for granular control over routing decisions.
NEW QUESTION # 128
Which two traffic types are processed by a Routing Engine using Junos OS? (Choose two.)
- A. local management traffic
- B. routing updates
- C. transit traffic
- D. traffic with CoS markings
Answer: A,B
Explanation:
The Routing Engine (RE) in a Junos device serves as the centralized intelligence and management hub, primarily responsible for the control and management planes of the system. In this capacity, the RE is tasked with processing routing updates, such as OSPF Link State Advertisements (LSAs) or BGP Update messages. These updates are vital for the RE to maintain the Routing Information Base (RIB), calculate the shortest paths, and subsequently populate the Forwarding Information Base (FIB) which is then pushed to the Packet Forwarding Engine (PFE).
Furthermore, the Routing Engine handles all local management traffic. This category encompasses administrative access through the Command Line Interface (CLI) via SSH or Telnet, SNMP queries from network management systems, and system logging processes.
Because the RE runs the Junos OS kernel, it must directly interpret and respond to these management-level requests to ensure the device remains configurable and observable.
Conversely, transit traffic--the data passing through the device from one ingress port to an egress port--is offloaded to the PFE to be handled at wire speed. While the PFE manages the heavy lifting of data forwarding and Class of Service (CoS) application, the RE remains focused on high- level protocol maintenance and system administration, ensuring that control plane stability is maintained even under heavy traffic loads.
NEW QUESTION # 129
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