Easy To Download Juniper JN0-105 Exam Dumps Updated 109 Questions
New Updated JN0-105 Exam Questions 2026
Juniper JN0-105 Exam Syllabus Topics:
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NEW QUESTION # 54
Exhibit
term limit-icmp { from {
source-address {
172.25.11.0/24;
}
protocol icmp;
}
then {
count count-icmp; discard;
}
}
Referring to the exhibit, which two actions will occur when a packet matches the firewall filter? (Choose two.)
- A. An ICMP destination unreachable message will be returned.
- B. A counter will be incremented.
- C. The packet will be discarded.
- D. The packet will be forwarded.
Answer: C
Explanation:
Referring to the firewall filter configuration in the exhibit, when a packet matches the specified term limit-icmp, two actions are defined in thethenstatement:count count-icmpanddiscard. Thecount count-icmp action means that each time a packet matches this term, a counter namedcount-icmpwill be incremented, providing a tally of how many packets have matched the term. Thediscardaction means that the packet will be dropped and not forwarded through the device. This effectively prevents the packet from reaching its intended destination. There is no action specified that would cause an ICMP destination unreachable message to be returned, nor is there any action that would allow the packet to be forwarded.
NEW QUESTION # 55
Which two statements are true about the candidate configuration? (Choose two.)
- A. You can deploy multiple changes at the same time.
- B. Multiple users cannot modify the same candidate configuration.
- C. Candidate configuration changes are automatically applied.
- D. You can discard changes before committing them.
Answer: A,D
Explanation:
The candidate configuration in Junos OS is a temporary configuration that allows network administrators to make and stage multiple configuration changes before applying them to the device. This approach enables the deployment of multiple changes in a single operation, ensuring that all configurations work together as intended before making them active. Additionally, the candidate configuration can be discarded if the administrator decides not to apply the staged changes, allowing for a "trial and error" approach without affecting the currently active configuration. This feature provides flexibility and reduces the risk of disruptive changes to the network.
NEW QUESTION # 56
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)
- A. FTP
- B. HTTP
- C. RCP
- D. SCP
Answer: C,D
Explanation:
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.
Reference: Juniper Networks Documentation on Configuration Archival
"You can configure Junos OS to automatically archive the configuration using protocols such as SCP and RCP upon commit."
NEW QUESTION # 57
Which two actions happen when multiple users issue the configure exclusive command to enter configuration mode on a Junos device? (Choose two.)
- A. The candidate configuration is locked.
- B. Other users cannot enter configuration mode.
- C. The candidate configuration is unlocked.
- D. Other users can enter configuration mode.
Answer: B
Explanation:
When a user enters configuration mode using theconfigure exclusivecommand on a Junos device, the candidate configuration is locked for that user, preventing other users from making concurrent configuration changes. This exclusive lock ensures that only one user can make changes at a time, preventing conflicts and potential errors from simultaneous modifications. Other users attempting to enter configuration mode while it is locked will receive a notification that the configuration is currently being edited by another user.
NEW QUESTION # 58
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?
- A. The messages.log file is deleted.
- B. The factory default configuration is loaded.
- C. The Junos device is rebooted.
- D. The interface changes you made are discarded.
Answer: D
Explanation:
In Junos OS, issuing therollback 0command reverts the candidate configuration to the last committed configuration. If you have made changes to some interfaces but have not committed those changes, using rollback 0will discard these uncommitted changes, reverting to the state of the configuration at the time of the last commit. This command does not affect system files likemessages.log, reboot the device, or load the factory default configuration; it simply undoes uncommitted changes.
NEW QUESTION # 59
Which process in the Junos OS is responsible for maintaining routing protocols and tables?
- A. rpd
- B. mgd
- C. dcd
- D. chassisd
Answer: A
Explanation:
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 # 60
Which component is considered part of the data plane?
- A. the fan tray
- B. the Packet Forwarding Engine
- C. the Routing Engine
- D. the power supply
Answer: B
Explanation:
The Packet Forwarding Engine (PFE) is an integral component of Juniper Networks devices, responsible for the data plane operations. The data plane, also known as the forwarding plane, is where the actual processing and forwarding of packets occur based on the routing and forwarding tables. The PFE executes the forwarding decisions made by the Routing Engine (RE), handling all packet transmissions, including routing, filtering, and switching packets towards their destination. This contrasts with the control plane operations handled by the RE, which involve routing table maintenance, system management, and control protocol processing.
NEW QUESTION # 61
Which two statements are correct about MAC addresses? (Choose two.)
- A. Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.
- B. The source and destination MAC addresses always remains static to the final destination.
- C. The MAC address identifies the physical hardware.
- D. Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.
Answer: C,D
Explanation:
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 # 62
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. show interface terse
- B. show interface ge-0/0/3
- C. monitor interface traffic
- D. monitor interface ge-0/0/3
Answer: D
Explanation:
Themonitor interface ge-0/0/3command 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 # 63
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. interfaces
- B. defaults
- C. tags
- D. names
Answer: C
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 # 64
Click the Exhibit button.
Referring the exhibit, what does the highlighted number indicate?
- A. cost is 5
- B. hop count is 5
- C. route preference is 5
- D. metric is 5
Answer: C
Explanation:
In the exhibit shown, the highlighted number next to the route type (Static) within the square brackets indicates the route preference, also known as the administrative distance. In Junos, the route preference is a value that determines the priority of the route source. Lower numbers indicate a higher priority when the routing table is being calculated. The route preference is used to select the best route when multiple paths to the same destination exist from different routing sources. The number 5 is unusually low for a static route by default, suggesting it has been manually configured to override other route types.
NEW QUESTION # 65
Exhibit
user@router> show route 192.168.36.1
inet.O: 5 destinations, 6 routes (5 active, 0 holddown, 0 hidden) + = Active Route, - = Last Active, * = Both
192.168.36.1/32 *[Static/5] 00:00:31
> to 10.1.1.2 via ge-0/0/10.0 [OSPF/IO] 00:02:21, metric 1 > to 10.1.1.2 via ge-0/0/10.0 Referring to the exhibit, which route(s) will be selected by Junos for packet forwarding?
- A. The OSPF route will be selected.
- B. The Junos OS randomly selects one route.
- C. The Junos OS selects both routes.
- D. The static route will be selected.
Answer: D
Explanation:
Junos OS selects routes based on the route preference (also known as administrative distance). Static routes typically have a lower route preference than OSPF routes, meaning they are more preferred. Since the static route to 192.168.36.1/32 is shown with a preference of 5, it will be selected over the OSPF route for packet forwarding, assuming no other factors such as route filters or policies affect the routing decision.
NEW QUESTION # 66
Which command modifier would you use to see all possible completions for a specific command?
- A. |
- B. ?
- C. extensive
- D. detail
Answer: B
Explanation:
In Junos OS, the ? command modifier is used to display all possible completions for a specific command. This helps users understand the available options and syntax for a command they are trying to use.
Reference: Juniper Networks CLI Documentation
"Use the ? command modifier to display all possible completions for a specific command."
NEW QUESTION # 67
You want to redeploy a Junos device by clearing the existing configuration and resetting it to factory defaults.
In this scenario, which command would help to accomplish this task?
- A. request systemstorage cleanup dry-run
- B. request systemzeroize media
- C. show system storage
- D. request systemstorage cleanup
Answer: B
Explanation:
Therequest system zeroize mediacommand on a Junos device securely erases all data, including configuration and log files, and resets the device to its factory default settings. This command is used when redeploying a device to ensure no residual data remains from its previous deployment. It's a comprehensive and secure way to clear all configurations and data, making the device as if it were new. The other commands listed do not perform a full reset to factory defaults; for example,show system storagedisplays storage information, andrequest system storage cleanupoffers to delete unnecessary files without resetting the device to factory settings.
NEW QUESTION # 68
What are two physical interface properties? (Choose two.)
- A. routing protocols
- B. MAC address
- C. MTU
- D. IP address
Answer: B,C
Explanation:
Two physical interface properties in Junos OS include the MAC address (A) and the Maximum Transmission Unit (MTU) size (D). The MAC address is a hardware identifier for the network interface, while the MTU size determines the largest packet size that the interface can transmit without needing to fragment the packet.
NEW QUESTION # 69
You want to redeploy a Junos device by clearing the existing configuration and resetting it to factory defaults.
In this scenario, which command would help to accomplish this task?
- A. request system zeroize media
- B. request system storage cleanup
- C. show system storage
- D. request system storage cleanup dry-run
Answer: A
Explanation:
The request system zeroize media command on a Junos device securely erases all data, including configuration and log files, and resets the device to its factory default settings. This command is used when redeploying a device to ensure no residual data remains from its previous deployment. It's a comprehensive and secure way to clear all configurations and data, making the device as if it were new. The other commands listed do not perform a full reset to factory defaults; for example, show system storage displays storage information, and request system storage cleanup offers to delete unnecessary files without resetting the device to factory settings.
NEW QUESTION # 70
By default, how does the PFE manage unicast traffic destined for an existing forwarding table entry?
- A. It sends the traffic through one port toward its destination.
- B. It sends the traffic through multiple ports toward its destination.
- C. It sends all traffic to the control plane for further processing.
- D. It sends the traffic through the f xpl interface to the RE.
Answer: A
Explanation:
In a Juniper Networks device, the Packet Forwarding Engine (PFE) processes unicast traffic by forwarding it according to the existing entries in the forwarding table. When the PFE encounters unicast traffic destined for an address that has a corresponding entry in the forwarding table, it directs the traffic through a specific outgoing interface or port toward its destination. This process is based on the most efficient path determined by the routing protocols in use, ensuring that the packet reaches its intended destination through a singular path, unless specific configurations such as load balancing are in place.
NEW QUESTION # 71
Which process in the Junos OS is responsible for maintaining routing protocols and tables?
- A. rpd
- B. mgd
- C. dcd
- D. chassisd
Answer: A
Explanation:
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 # 72
What is the primary system log file that is present in the default configuration of a Junos device?
- A. messages
- B. jsrpd
- C. kmd
- D. vrrp
Answer: A
Explanation:
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 # 73
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.)
- A. run show interface terse
- B. request system shutdown
- C. set interface ge-0/0/0 unit 0 family inet
- D. show interface ge-0/0/0
Answer: D
Explanation:
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 # 74
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