JN0-104 Practice Test Free – 50 Real Exam Questions to Boost Your Confidence
Preparing for the JN0-104 exam? Start with our JN0-104 Practice Test Free – a set of 50 high-quality, exam-style questions crafted to help you assess your knowledge and improve your chances of passing on the first try.
Taking a JN0-104 practice test free is one of the smartest ways to:
- Get familiar with the real exam format and question types
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- Gain the confidence you need to succeed on exam day
Below, you will find 50 free JN0-104 practice questions to help you prepare for the exam. These questions are designed to reflect the real exam structure and difficulty level. You can click on each Question to explore the details.
Which step is required when performing a Junos software upgrade?
A. You must create a user account named maintenance-user.
B. You must reboot the device.
C. You must load the factory default configuration.
D. You must zeroize the device.
What will the help syslog UI_DBASE_LOGOUT_EVENT command show you?
A. It will show you the options you can use with sysiog UI_DBASE_LOGOUT_EVENT
B. It will show you only UI_DBASE_LOGOUT_EVENT messages in the system log
C. It will only show you syslog messages without UI_DBASE_LOGOUT_EVENT
D. It will describe the UI_DBASE_LOGOUT_EVENT message code
You must apply the policy shown in the exhibit to readvertise BGP routes to OSPF neighbors. Which action will accomplish this task?
A. You must apply the policy as an export policy within the OSPF configuration.
B. You must apply the policy as an export policy within the BGP configuration.
C. You must apply the policy as an import policy within the OSPF configuration.
D. You must apply the policy as an import policy within the BGP configuration.
You are asked to enable the configuration archival feature on your device running Junos OS. Which two backup scenarios exist? (Choose two.)
A. When a user performs a commit operation
B. When a user logs in to the device
C. When a specific time interval passes
D. When a user logs out of the device
You must recover a device by loading the rescue configuration file. In this scenario, which command will accomplish this task?![]()
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Referring to the exhibit, which statement is correct?
A. Traffic destined to 10.10.102.0/30 will be forwarded to 10.10.4.2.
B. Traffic destined to 10.10.102.0/30 will be silently dropped.
C. Traffic destined to 10.10.102.0/30 will be forwarded to 10.10.101.1.
D. Traffic destined to 10.10.102.0/30 will be load-balanced across both next hops.
You want to temporarily apply a candidate configuration to the active configuration and automatically roll back after 10 minutes. In this scenario, which command will accomplish this task?
A. commit confirmed
B. commit check
C. commit
D. commit at
You are troubleshooting a routing issue on a device running Junos. You receive the error shown in the exhibit when you attempt to restart the routing process. Which statement describes the problem?
A. You have typed an invalid command.
B. You do not have permission to restart the routing process.
C. The routing process can only be restarted from configuration mode.
D. The routing process must be restarted from the shell.
What is the network address for a host with an IP address of 192.168.87.125/16?
A. 192.168.96.0
B. 192.168.87.0
C. 192.168.128.0
D. 192.168.0.0
Which two statements about the configure exclusive command are correct? (Choose two.)
A. The command causes the loss of all uncommitted changes when exiting exclusive mode.
B. The command allows multiple users to edit private copies of the configuration concurrently.
C. The command retains all uncommitted changes when exiting exclusive mode.
D. The command excludes other users from editing the configuration.
Which two statements describe the functions of the Packet Forwarding Engine (PFE)? (Choose two.)
A. The PFE will route or switch packets or frames out of the correct interface as quickly as possible.
B. The PFE will apply filters and routing policies when forwarding the packets to their final destination.
C. A The PFE will process management traffic to help monitor and manage the network device.
D. A The PFE will calculate the best network path to each individual subnet based on input from various routing protocols and static routes.
Which two routing policy actions are considered policy flow control actions in the Junos OS? (Choose two.)
A. next hop
B. next policy
C. accept
D. next term
What will happen when you commit the configuration shown in the exhibit?
A. All gigabit interfaces will inhent the family inet configuration
B. Gigabit interfaces on FPC 2 will inherit the family inet configuration
C. VLAN 0 will be applied to gigabit interfaces on FPC 2
D. VLAN 0 will be applied to all gigabit interfaces
After logging in as root you enter the cli command. What does this command do?
A. It enables you to enter line edit mode
B. It enables you to enter configuration mode
C. It enables you to enter operational mode
D. It enables you to enter interface mode
Referring to the exhibit, what will be the source address for packets egressing et-0/0/34.0?
A. 10.20.0.1
B. 10.30.0.1
C. 10.10.0.1
D. 10.40.0.1
Which statement about the show chassis hardware command is correct?
A. The command provides a list of supported hardware components and their current operating status.
B. The command provides a list of all current hardware utilization statistics and operational status.
C. The command provides a list of installed hardware components, including serial numbers and model numbers.
D. The command provides a list of supported hardware components and environmental thresholds.
What information is provided by the help topic interface ? command?
A. It displays the best options to use with the interface command regarding your current configuration
B. It displays the available options and a brief description of usage guidelines
C. It displays the administration manual for the interface command
D. It displays usage examples for the top-ten interface commands
Which two operating systems are used as the foundation of the Junos OS? (Choose two.)
A. Linux
B. Ubuntu
C. CentOS
D. FreeBSD
What are two functions of the transport layer? (Choose two.)
A. data integrity
B. packet forwarding
C. flow control
D. segmentation
You enable unicast reverse path forwarding on the ge-0/0/1.0 interface A packet is received on the ge-0/0/1.0 interface with a source address of 10.10.10.10. A route lookup determines that the next hop for the 10.10.10.10 address is the ge-0/0/1.0 interface. In this scenario which action is performed?
A. The packet is logged
B. The packet is forwarded
C. The packet is rejected
D. The packet is discarded
Referring to the exhibit, which two statements are correct? (Choose two.)
A. The last 5 second CPU utilization is 1%
B. The last 5 second CPU utilization is 99%
C. The control plane memory used is 63%
D. The data plane memory used is 63%
Which command will solve the problem shown in the exhibit?
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In the show | compare rollback 49 command, what is the purpose of the | ?
A. The | is used to represent an “either or” statement
B. The | is a shortcut to redirect output from a command line to a file
C. The | filters the output of the show command T
D. The | changes the command from an operational command to a configuration mode command
User 1 pings Router C to determine its status. Which router shown in the exhibit, treats the traffic generated by the ping command as exception traffic?
A. Router A
B. Router D
C. Router B
D. Router C
Which layer of the OSI model does a router use to make forwarding decisions?
A. Layer 3
B. Layer 4
C. Layer 5
D. Layer 2
Your Junos OS routers use a static route to provide connectivity to the management network. You do not want this static route to be redistributed using a dynamic routing protocol In this scenario, which static route configuration parameter will accomplish this task?
A. no-readvertise
B. no-rerain
C. no-install
D. no-resolv
Which attribute must be defined when configunng a non-root user in Junos OS?
A. class
B. uid
C. authentication
D. full-name
What are two functions of the PFE? (Choose two.)
A. to maintain the forwarding tables
B. to monitor the chassis
C. to forward transit traffic
D. to apply the class of service function
You must verify that interface ge-0/0/0.0 is administratively up and that the link is up. In this scenario, which command will accomplish this task?
A. snow configuration interfaces ge-0/0/0.0
B. show system information
C. show interfaces terse
D. show chassis fpc pic-status
Which two parameters are considered action modifiers in the firewall filter's then statement? (Choose two.)
A. next term
B. policer
C. reject
D. count
Which operational mode command in Junos OS produces the output shown in the exhibit?
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Which output displays that the peer has been selected for NTP synchronization?![]()
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A router contains both a static route and an OSPF route for the 172.18.100.0/24 prefix in its routing table. The router is configured to use the factory-default Junos OS routing preference values. In this scenario, which statement is correct?
A. The OSPF route will be active because of a lower default preference value
B. The OSPF route will be active because of a higher default preference value
C. The static route will be active because of a lower default preference value
D. The static route will be active because of a higher default preference value
Which two statements about exception traffic processing are correct? (Choose two.)
A. By default, a rate-limiter for exception traffic exists on the internal link between the control plane and the forwarding plane.
B. By default, no rate-limiter for exception traffic exists on the internal link between the control plane and the forwarding plane.
C. When congestion occurs, local and control traffic are given preference.
D. When congestion occurs, only exception traffic is given preference.
Which statement about the Junos OS forwarding table is correct?
A. The forwarding table is responsible for identifying and selecting active routes.
B. The forwarding table is only stored on the Routing Engine.
C. The forwarding table consolidates routes from multiple sources.
D. The forwarding table is populated with active routes from the routing table.
What happens if the packet shown in the exhibit is received by a device running Junos OS?
A. The packet is received by the RE first and then redirected to the PFE.
B. The packet is received by the PFE first and then redirected to the RE.
C. The packet is handled by the PFE alone.
D. The packet is handled by the RE alone.
Which command should you use to check real-time statistics of all active interfaces?
A. user@router> monitor interface traffic
B. user@router> show interface detail
C. user@router> show interface terse
D. user@router> monitor traffic extensive
Which two Juniper Networks products are available in virtual machine (VM) format? (Choose two.)
A. vPTX
B. vIDP
C. vSRX
D. vMX
A user has entered the sequence of commands shown in the exhibit. At which level of the configuration hierarchy would the user be after typing the exit command?
A. [edit]
B. [edit interfaces ge-0/0/0]
C. [edit interfaces ge-0/0/0 unit 0]
D. [edit interfaces]
Assuming both paths shown in the exhibit are available, which statement is correct?
A. Traffic matching the default route will use 172.16.1.1 as the next hop
B. Traffic matching the default route will use 172.16.1.254 as the next hop
C. Traffic matching the default route will be load-balanced per flow across both next hops
D. Traffic matching the default route will be load-balanced per packet across both next hops.
Which command will replace the entire candidate configuration with the configuration stored in the reset.config file?
A. load replace reset.config
B. load override reset.config
C. load merge reset.config
D. rollback 1
What information is provided by the show route forwarding-table command?
A. the outgoing interface(s) associated with the destination prefixes
B. the protocol from where the route was learned
C. the routing table stored on the RE
D. the number of routes that are active, hidden, or in a hold-down state
Referring to the exhibit, which statement is correct?
A. The packets have exceeded the time-to-live value.
B. There is a routing loop.
C. The asterisks indicate a response time out.
D. The asterisks indicate the trace route Is completeׁ
You are asked to determine when a Junos device was booted. Which command would you use to obtain this information?
A. snow system statistics
B. show system uptime
C. show system commit
D. show system information
Referring to the exhibit, you are unable to see any traffic coming on interface ge-0/0/0. What is causing this problem?
A. The ge-0/0/0 interface is administratively down
B. The ge-0/0/0 interface has flow control disabled
C. The ge-0/0/0 interface s physical link is down
D. The ge-0/0/0 interface has the link-mode set to half-duplex
Referring to the exhibit, what happens when you issue the exit command at the [edit protocols ospf area 0.0.0.51 stub] hierarchy level?
A. You move one level up to the [edit protocols ospf area 0.0.0.51] hierarchy level.
B. You exit the configuration mode.
C. You move to the [edit] hierarchy level.
D. You move to the most recent higher level of the [edit protocols ospf] hierarchy.
[edit] user@router# In which mode is the system currently operating, as shown in the exhibit?
A. operational mode
B. UNIX shell
C. configuration mode
D. single-user mode
A packet destined to the 172.27.102.65 IP address is received by the ge-0/0/1.0 interface on your Junos device. The input firewall filter shown in the exhibit is applied to the ge-0/0/1.0 interface. Which two actions are performed in this scenario? (Choose two.)
A. The packet is logged.
B. The packet is discarded.
C. The packet is accepted.
D. The packet is counted.
You are asked to configure filter-based forwarding. Which routing-instance type would you use?
A. virtual router
B. non-forwarding
C. VRF
D. forwarding
Which two statements about firewall filters are correct? (Choose two.)
A. An input filter is used to control routes that are accepted by the local routing table
B. An output filter determines the routes in the local routing table that are advertised to peers
C. An input filter is used to control incoming traffic on a specific interface
D. An output filter is used to control outgoing traffic on a specific interface
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