JN0-104 Mock Test Free – 50 Realistic Questions to Prepare with Confidence.
Getting ready for your JN0-104 certification exam? Start your preparation the smart way with our JN0-104 Mock Test Free – a carefully crafted set of 50 realistic, exam-style questions to help you practice effectively and boost your confidence.
Using a mock test free for JN0-104 exam is one of the best ways to:
- Familiarize yourself with the actual exam format and question style
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Below, you will find 50 free questions from our JN0-104 Mock Test Free resource. These questions are structured to reflect the real exam’s difficulty and content areas, helping you assess your readiness accurately.
Referring to the exhibit, which statement is correct?
A. The device will attempt to authenticate using the local database if RADIUS and TACACS+ are unresponsive.
B. The device will randomly select the authentication method used for each new login attempt.
C. The device will attempt to authenticate using RADIUS and TACACS+ at the same time.
D. The device will never attempt to authenticate using the local database.
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
[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
You are attempting to capture traffic being sent to IP address 100.0.0.2. but are unable to see any packets. Referring to the exhibit, what is the problem?
A. You must add the size parameter to the command
B. Traffic destined for 100.0.0.2 is transit traffic
C. You must add the layer2-headers parameter to the command
D. You must use the dat 100.0.0.2 match condition instead of the arc 100.0.2.2 match condition
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 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 are asked to configure a Junos device to perform regular configuration backups. Which feature will you configure under the [edit system] hierarchy to accomplish this task?
A. syslog
B. backup-router
C. tracing
D. archival
Which command allows multiple users to edit a configuration while committing only their unique changes?
A. configure dynamic
B. configure batch
C. configure exclusive
D. configure private
You are connecting to a new device in your network and are presented with the information and prompt shown in the exhibit. Which three steps must be carried out to edit the configuration on this device? (Choose three.)
A. Log in using the root user with no password.
B. Log in using the root user with the root123 password.
C. Type configure at the > prompt.
D. Type cli at the > prompt.
Which output displays that the peer has been selected for NTP synchronization?![]()
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What are two benefits of class of service (CoS)? (Choose two.)
A. CoS can increase the performance of a slow network.
B. CoS can manage traffic congestion.
C. CoS can increase network bandwidth.
D. CoS can prioritize latency-sensitive traffic.
Which statement is true about a virtual router routing instance?
A. It can be used for Layer 3 VPN implementations.
B. An interface in the routing instance can also reside in the default routing instance.
C. It automatically has import and export policies applied.
D. It can be used to create a separate routing table.
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
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
Which command will solve the problem shown in the exhibit?
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What are two functions of the transport layer? (Choose two.)
A. data integrity
B. packet forwarding
C. flow control
D. segmentation
You have applied the policy shown in the exhibit as an import policy to your BGP group. In this scenario, what will happen when the router receives the 192.168.30.48/32 route?
A. It will match term-1 and be accepted.
B. It will match term-2 and be rejected.
C. It will be sent to the default BGP policy.
D. It will match term-2 and be accepted.
You are creating a new routing policy on your Junos device. You are currently receiving multiple routes within the 10.10.10.0/24 subnet from the same upstream BGP neighbor. Your policy should only allow the 10.10.10.0/24 route and reject all other routes within that /24 range. Referring to the exhibit, which route filter match type would satisfy this requirement?
A. orlonger
B. longer
C. exact
D. prefix-length-range /24-/32
Which three connection protocols allow you to gather operational information from the Junos device? (Choose three.)
A. NETCONF
B. Telnet
C. JSON
D. SSH
E. XML 13
Which three benefits are made possible by the separation of the control plane and forwarding plane of a Junos device? (Choose three.)
A. stateful firewall
B. deep packet inspection
C. in-service software upgrades
D. graceful Routing Engine switchover
E. nonstop active routing
Referring to the exhibit, you are unable to reach devices in the 172.19.25.0/28 subnet.What should you do to solve this problem?
A. Enable the ge-0/0/2.1 interface.
B. Enable the ge-0/0/2 interface.
C. Enable the ge-0/0/2.2 interface.
D. Enable the ge-0/0/2.0 interface.
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 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
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
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]
You loaded the factory-default configuration on your Junos device. Which single element must be configured before a commit command will succeed?
A. An IPv4 address must be configured on the fxp0 or em0 interface
B. A hostname must be configured
C. A root password must be configured
D. An IPv4 default route must be configured
What Will the request system configuration rescue save command accomplish?
A. It will prevent a commit from happening.
B. It will generate support information for JTAC.
C. It will restore your system to factory default settings.
D. It will save a copy of the configuration so that you can go back to it at any time.
Which address correctly represents a valid abbreviation for the 2bfc:0000:0000:0000:0217:0000:fe8c:5c85/128 IPv6 address?
A. 2bfc:0217: fe8c:5c85/128
B. 2bfc:0:217::fe8c:5c85/128
C. 2bfc:0:217:0:fe8c:5c85/128
D. 2bfc::217:0:fe8c:5c85/128
Which two statements describe the RE on Junos OS devices? (Choose two.)
A. The RE maintains the routing tables.
B. The RE provides hardware status messages for the PFE.
C. The RE forwards traffic based on its local copy of the forwarding table.
D. The RE is considered the control plane.
Which system-defined user class is able to perform all operations on a device?
A. operator
B. authorized
C. read-write
D. super-user
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
Referring to the exhibit, if the router forwards traffic destined for 192.168.77.29, which next hop will be used?
A. 10.10.1.2
B. 10.10.20.2
C. 10.10.0.2
D. 10.10.11.2
Which operational mode command in Junos OS produces the output shown in the exhibit?
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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.
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
Which statement is true about using custom login class permissions?
A. If you allow and deny the same command, the command is denied.
B. If you allow and deny the same command, Junos OS will randomly choose the action.
C. If you allow and deny the same command, the command is allowed.
D. If you allow and deny the same command, the Junos OS will fail the commit check.
When you choose to read your e-mail using an e-mail client, your e-mail client interacts with which OSI layer?
A. session
B. transport
C. application
D. presentation
A device receives a route update for network 172.19.0.0/16 from two different routing information sources. In this scenario, which parameter will determine the active route?
A. the route learned with the lowest default route preference
B. the route with the lowest metric
C. the route learned from the next hop with the lowest IP address
D. the route learned from the next hop with the highest IP address
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
Which two operating systems are used as the foundation of the Junos OS? (Choose two.)
A. Linux
B. Ubuntu
C. CentOS
D. FreeBSD
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
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.
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.
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
You are troubleshooting a problem on your Junos device. You want to view the syslog messages in real-time on your terminal. In this scenario, which command will accomplish this task?
A. monitor log messages
B. show log traceoptions
C. show log messages
D. monitor start message
You must recover a device by loading the rescue configuration file. In this scenario, which command will accomplish this task?![]()
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What is the default action for packets not matching a firewall filter?
A. The packet will be silently discarded.
B. The packet will be accepted.
C. The packet will be rejected.
D. The packet will be ignored.
Which component is responsible for performing protocol updates and system management?
A. Packet Forwarding Engine
B. bridging table
C. forwarding tables
D. Routing Engine
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.
Which two statements about login classes are correct? (Choose two.)
A. Login class permissions can be overridden for certain commands.
B. Login classes define access privileges for a user.
C. There are no system-defined login classes.
D. Users can be members of multiple login classes.
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