Nov-2025 New Version JN0-105 Certificate & Helpful Exam Dumps is Online [Q16-Q37]

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Nov-2025 New Version JN0-105 Certificate & Helpful Exam Dumps is Online

JN0-105 Free Certification Exam Material with 109 Q&As

NEW QUESTION 16
You have logged on to a Junos device and are at the operational mode prompt.
Which two commands are used at this prompt? (Choose two.)

show interface ge-0/0/0

request system shutdown

set interface ge-0/0/0 unit 0 family inet

run show interface terse

At the operational mode prompt on a Junos device, you can use various commands to view the device’s status and request system operations. The show interface ge-0/0/0 command is used to display information about a specific interface, while the request system shutdown command is used to properly shut down the device.
The set command is used in configuration mode, not operational mode, and the run command is used to execute operational mode commands from configuration mode.

NEW QUESTION 17
Which two statements are correct about MAC addresses? (Choose two.)

Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.

The source and destination MAC addresses always remains static to the final destination.

The MAC address identifies the physical hardware.

Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.

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.

NEW QUESTION 18
Click the Exhibit button.

How is traffic, sourced from 10.0.0.0/8, treated by the firewall filter shown in the exhibit?

logged and discarded

logged and rejected

logged with no further action

logged and accepted

The firewall filter configuration in the exhibit specifies a filter with two terms. Term 1 matches traffic from the source address 10.0.0.0/8 and has two actions: ‘log’ and ‘next term’. The ‘log’ action will record the match to a log file, and ‘next term’ indicates that the firewall should evaluate the next term after logging. There is no explicit action such as ‘accept’ or ‘reject’ in term 1, so by default, the traffic will be accepted unless subsequently rejected by another term.
Term 2 has the action ‘reject’, which discards packets that reach this term. Since there is no ‘from’ condition in term 2, it acts as a default rule for all traffic not matched by term 1.
Because the traffic sourced from 10.0.0.0/8 matches term 1 and there is no reject action in that term, it will be logged and then accepted by the firewall filter. There is no subsequent term that rejects this specific traffic, so the action from term 2 does not apply to it.

NEW QUESTION 19
Which protocol would you configure to synchronize the time and date on a Junos device?

SNMP

RIP

NTP

NMP

The Network Time Protocol (NTP) is designed to synchronize the clocks of computers over a network.
Configuring NTP on a Junos device ensures that its clock is set accurately, which is crucial for logging, troubleshooting, and maintaining the integrity of time-sensitive operations and security protocols. NTP allows devices to use a hierarchy of time sources, from primary servers synchronized to a reference clock (such as an atomic clock or GPS time) to secondary servers that distribute the time to other devices on the network.

NEW QUESTION 20
Which two statements are true about the Junos OS? (Choose two.)

Routing tables are stored in the control plane.

Exception traffic is never sent to the control plane.

Exception traffic is sent to the control plane.

Routing tables are stored in the forwarding plane.

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 informationbase 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 21
Which process in the Junos OS is responsible for maintaining routing protocols and tables?

mgd

chassisd

rpd

dcd

The Routing Protocol Daemon (rpd) in Junos OS is responsible for maintaining routing protocols and tables.
It handles all routing information, including the calculation of routes and the population of the routing table, making it crucial for dynamic routing operations.

NEW QUESTION 22
What are two advantages of using the Junos OS? (Choose two.)

It enables you to roll back to a previous configuration.

It pushes your configuration changes “live” immediately.

It is modular.

It supports up to a maximum of two previous configurations.

One of the key advantages of Junos OS is its ability to roll back to previous configurations. This feature allows administrators to revert to an earlier configuration state, which is invaluable for quickly recovering from configuration errors or undesired changes. Junos OS maintains an archive of previous configurations, enabling easy rollback to any saved state. Another significant advantage of Junos OS is its modular design.
The operating system is structured so that different processes and services run in separate protected memory spaces, enhancing the stability and reliability of the system. If one process fails, it does not affect the others, thereby minimizing the risk of system-wide failures.

NEW QUESTION 23
Which two functions are performed by the PFE? (Choose two.)

It implements firewall filters.

It selects active routes.

It forwards transit traffic.

It maintains the routing table.

The Packet Forwarding Engine (PFE) in Junos OS performs several key functions, including implementing firewall filters (A) and forwarding transit traffic (C). The PFE applies firewall filter rules to incoming and outgoing traffic and is responsible for the high-speed forwarding of packets based on the information in the forwarding table.

NEW QUESTION 24
What are two benefits when implementing class of service? (Choose two.)

The network will be faster.

Traffic congestion can be managed.

Traffic congestion will be eliminated.

Latency-sensitive traffic can be prioritized

Implementing Class of Service (CoS) in a network provides numerous benefits, particularly in managing traffic based on its importance, source, or type. CoS enables network administrators to manage traffic congestion by applying various queuing techniques and policies to ensure that critical services remain unaffected during high congestion periods. Additionally, CoS allows for the prioritization of latency-sensitive traffic such as voice and video, ensuring that these services maintain quality despite varying network conditions.

NEW QUESTION 25
You are asked to convert the number 7 from decimal to binary.
Which number is correct in this scenario?

00001000

00010000

00000111

11100000

To convert the decimal number 7 to binary, the correct representation is 00000111 (C). In binary, 7 is represented as 1+2+4 (2^0 + 2^1 + 2^2), which corresponds to the last three digits being 1 in the binary format, with leading zeros added for clarity.

NEW QUESTION 26
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)

SCP

RCP

FTP

HTTP

Junos OS supports multiple methods for automatically archiving configurations upon commit. Two of the supported methods are SCP (Secure Copy Protocol) and RCP (Remote Copy Protocol). These methods can be configured to save the configuration files to a remote server automatically whenever a commit is made.

NEW QUESTION 27
What will the request system configuration rescue save command do?

It saves the most recently committed configuration as the rescue configuration.

It saves the candidate configuration as the rescue configuration.

It saves a configuration version prior to the configuration most recently committed as the rescue configuration.

It activates the rescue configuration.

The “request system configuration rescue save” command in Junos OS saves the most recently committed configuration as the rescue configuration, making A the correct answer. This feature allows administrators to set a known good configuration that can be quickly reverted to in case of configuration errors or issues.

NEW QUESTION 28
What will the request system configuration rescue save command do?

It saves the most recently committed configuration as the rescue configuration.

It saves the candidate configuration as the rescue configuration.

It saves a configuration version prior to the configuration most recently committed as the rescue configuration.

It activates the rescue configuration.

The request system configuration rescue save command in Junos OS saves the most recently committed configuration as the rescue configuration. This rescue configuration can be used to recover the device if future configurations cause issues. It ensures there is a stable, known-good configuration to fall back on, which is crucial in network management and troubleshooting.
References:
* “rescue : save configurations as the rescue: request system configuration save ……………..( saves the current configs as a rescue configs )” from Useful Juniper Commands.txt.
* Juniper official documentation: Configuring and Activating a Rescue Configuration.

NEW QUESTION 29
What are two advantages of using the Junos OS? (Choose two.)

It enables you to roll back to a previous configuration.

It pushes your configuration changes “live” immediately.

It is modular.

It supports up to a maximum of two previous configurations.

One of the key advantages of Junos OS is its ability to roll back to previous configurations. This feature allows administrators to revert to an earlier configuration state, which is invaluable for quickly recovering from configuration errors or undesired changes. Junos OS maintains an archive of previous configurations, enabling easy rollback to any saved state. Another significant advantage of Junos OS is its modular design. The operating system is structured so that different processes and services run in separate protected memory spaces, enhancing the stability and reliability of the system. If one process fails, it does not affect the others, thereby minimizing the risk of system-wide failures.

NEW QUESTION 30
Which two statements are correct about a Routing Engine? (Choose two.)

It processes CoS marked traffic.

It forwards transit traffic.

It processes management traffic.

It maintains routing tables.

The Routing Engine (RE) in Juniper Networks devices plays a pivotal role in the control plane, handling tasks that are critical for the operation and management of the network. One of its key functions is processing management traffic, which includes user commands, system configuration, and monitoring operations. The RE also maintains routing tables, which are essential for network routing decisions. These tables contain network topology information and routing paths, which the RE uses to update the Packet Forwarding Engine (PFE) so that it can forward packets appropriately. The RE does not forward transit traffic or process Class of Service (CoS) marked traffic, as these tasks are handled by the PFE.

NEW QUESTION 31
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?

defaults

interfaces

names

tags

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 32
You are logged in to a Junos OS device with SSH and issued the show protocols | compare command in the configuration, but no output is shown.
Which statement is correct in this scenario?

The command only works for interface configuration differences.

There are no changes to the candidate configuration.

Someone accidentally deleted the active configuration.

You must commit the configuration before any output will be shown.

The show | compare command in Junos OS is used to display the differences between the candidate configuration and the active configuration. If no output is shown when you issue this command, it means that there are no changes between the candidate configuration and the active configuration. This indicates that the candidate configuration is identical to the active configuration, and thus no differences are displayed.
Reference: Juniper Networks Documentation on Configuration Management
“The show | compare command displays the differences between the candidate configuration and the active configuration. If there are no changes, no output is displayed.”

NEW QUESTION 33
Exhibit.

Referring to the exhibit, which routing configuration is required for these two users to access the remote server?

Users must connect directly to the router.

Users and the server require a default gateway.

Trunk ports must be enabled on the switch.

A routing protocol must be enabled on the router.

For the users in the 10.1.1.0/24 subnet and the server in the 10.1.2.0/24 subnet to communicate with each other, they need to route packets through the router that connects these two subnets. Each user and the server need to have their default gateway set to the IP address of the router interface on their respective subnet (.
254). This ensures that packets destined for other subnets are sent to the router, which then routes them to the correct destination subnet.
References:
* Juniper official documentation: Configuring Basic Routing.
* General networking principles.

NEW QUESTION 34
You have configured some interfaces on a Junos device; however, you have not yet committed the configuration.
What happens if you issue the rollback 0 command in this scenario?

The messages.log file is deleted.

The factory default configuration is loaded.

The Junos device is rebooted.

The interface changes you made are discarded.

Issuing the rollback 0 command in Junos OS will discard any uncommitted changes and revert to the last committed configuration. This command effectively cancels any configuration changes that have been made but not yet committed, ensuring that the device returns to its previous stable state.
References:
“rollback 0 ……………………………..(rolls back the changes just made )” from Useful Juniper Commands.txt.
Juniper official documentation: Rolling Back a Configuration.

NEW QUESTION 35
Which prompt indicates that you are using configuration mode?

In Junos OS, the # prompt indicates that you are in configuration mode. This mode is used for making changes to the configuration of the device.
Reference: Juniper Networks CLI Modes
“The # prompt indicates that you are in configuration mode.”

NEW QUESTION 36
What is the primary system log file that is present in the default configuration of a Junos device?

kmd

messages

vrrp

jsrpd

In the default configuration of a Junos device, the primary system log file is “messages” (B). This log file contains a wide range of system messages, including operational status changes, system errors, and other critical information, making it a key resource for troubleshooting and monitoring the system’s health.

NEW QUESTION 37
Exhibit.

Referring to the exhibit, which routing configuration is required for these two users to access the remote server?

Users must connect directly to the router.

Users and the server require a default gateway.

Trunk ports must be enabled on the switch.

A routing protocol must be enabled on the router.

For the users in the 10.1.1.0/24 subnet and the server in the 10.1.2.0/24 subnet to communicate with each other, they need to route packets through the router that connects these two subnets. Each user and the server need to have their default gateway set to the IP address of the router interface on their respective subnet (.254). This ensures that packets destined for other subnets are sent to the router, which then routes them to the correct destination subnet.
Reference:
Juniper official documentation: Configuring Basic Routing.
General networking principles.

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