[May-2024] Exam JN0-105: New Brain Dump Professional - Pass4SureQuiz
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NEW QUESTION # 12
How many login classes are assignable to a user account?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
Junos OS supports multiple login classes that can be assigned to user accounts, allowing for different levels of access and permissions. The correct answer is C, 4. These classes include "super-user," "read-only,"
"operator," and "unauthorized." Each class provides a different level of access to the Junos device, ranging from full configuration and operational command privileges to limited access for monitoring and viewing configurations.
NEW QUESTION # 13
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 static route will be selected.
- C. The Junos OS selects both routes.
- D. The Junos OS randomly selects one route.
Answer: B
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 # 14
You are asked to view the real-time usage statistics for the busiest interfaces on a device running Junos OS.
Which command will achieve this task?
- A. show interfaces extensive
- B. monitor interface traffic
- C. monitor traffic
- D. monitor traffic absolute-sequence
Answer: B
Explanation:
To view real-time usage statistics for the busiest interfaces on a device running Junos OS, the correct command is B, "monitor interface traffic." This command provides a dynamic, real-time view of the traffic flowing through the interfaces, allowing administrators to quickly identify and monitor the busiest interfaces on the device.
NEW QUESTION # 15
In the Junos OS, which keyboard shortcut allows you to move to the start of the line?
- A. Ctrl+w
- B. Ctrl+a
- C. Ctrl+k
- D. Ctrl+e
Answer: B
Explanation:
In the Junos OS command-line interface (CLI), the keyboard shortcut Ctrl+a is used to move the cursor to the start of the line. This is a common convention in many command-line environments and text editors, providing a quick way to navigate to the beginning of the current command or line of text without having to use the arrow keys. This can be particularly useful for making quick edits to commands or for navigating long lines of text more efficiently.
NEW QUESTION # 16
What will the request system configuration rescue save command do?
- A. It saves the candidate configuration as the rescue configuration.
- B. It activates the rescue configuration.
- C. It saves a configuration version prior to the configuration most recently committed as the rescue configuration.
- D. It saves the most recently committed configuration as the rescue configuration.
Answer: D
Explanation:
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 # 17
Which two statements are correct about the empioyee@Ri> prompt? (Choose two.)
- A. You are in configuration mode.
- B. You are at a shell prompt.
- C. You are in operational mode.
- D. R1 is the hostname of your device.
Answer: C,D
Explanation:
In Junos OS, the prompt employee@R1> indicates the current context of the user interface. The 'R1' part of the prompt signifies the hostname of the device, which in this case is 'R1'. The absence of a '#' symbol at the end of the prompt suggests that the user is in operational mode, as opposed to configuration mode which is indicated by a prompt ending in '#'. Operational mode allows users to view the status of the device and execute operational commands, but does not allow for configuration changes.
NEW QUESTION # 18
You have just increased the MTU size of interface ge-0/0/0 and committed the configuration.
Which command would help you identify the applied MTU change?
- A. monitor traffic interface ge-0/0/0
- B. show interfaces ge-0/0/0
- C. show interfaces ge-0/0/0 terse
- D. monitor interface ge-0/0/0
Answer: B
Explanation:
After increasing the MTU size of an interface and committing the configuration, the command to verify the applied MTU change is D, "show interfaces ge-0/0/0." This command displays detailed information about the interface, including the current MTU size, making it the best choice for verifying the applied changes.
NEW QUESTION # 19
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. Enter and commit the new root password.
- B. Load the factory-default configuration.
- C. Use a console connection to reboot the device.
- D. Hit the space bar and enter recovery when prompted.
- E. Upgrade the Junos OS to the latest version.
Answer: A,C,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 # 20
Which two components are included in a transport header? (Choose two.)
- A. source MAC address
- B. destination port number
- C. source port number
- D. destination MAC address
Answer: B,C
NEW QUESTION # 21
When considering routing tables and forwarding tables, which two statements are correct? (Choose two.)
- A. The routing table is used by the RE to select the best route.
- B. The forwarding table is used by the RE to select the best route.
- C. The forwarding table stores all routes and prefixes from all protocols.
- D. The routing table stores all routes and prefixes from all protocols.
Answer: A,D
Explanation:
The routing table and forwarding table play distinct roles in a Junos OS device. The correct answers are A and
D: The routing table (A) is used by the Routing Engine (RE) to select the best route among all the learned routes, while the routing table (D) stores all routes and prefixes learned from all routing protocols. The forwarding table, in contrast, contains only the active routes chosen by the RE and is used by the Packet Forwarding Engine for actual packet forwarding.
NEW QUESTION # 22
What are two methods for navigating to configuration mode from an operational mode prompt? (Choose two.)
- A. Use the quit command.
- B. Use the exit command.
- C. Use the edit command.
- D. Use the configure command.
Answer: C,D
Explanation:
In Junos OS, to navigate from operational mode to configuration mode, you can use either theeditorconfigure command. Both commands move the CLI from operational mode, where you can view the state of the device, to configuration mode, where you can make changes to the device's configuration.
NEW QUESTION # 23
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. The packet will be forwarded.
- B. A counter will be incremented.
- C. The packet will be discarded.
- D. An ICMP destination unreachable message will be returned.
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 # 24
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. next hop MAC address
- B. BGP local preference value
- C. OSPF metric value
- D. outgoing interface name
- E. next hop IP address
Answer: A,D,E
Explanation:
The forwarding table in a network device requires specific information to efficiently forward traffic toward its destination. This includes the next hop IP address, which indicates the next router or device in the path to the destination. The outgoing interface name identifies the physical or logical interface through which the packet should be sent to reach the next hop. Lastly, the next hop MAC address is crucial for Layer 2 forwarding decisions, allowing the device to encapsulate the IP packet in a frame that can be understood by Ethernet or other Layer 2 protocols. OSPF metric values and BGP local preference values are used in the routing decision process to select the best path and populate the forwarding table but are not directly used by the forwarding table to forward traffic.
NEW QUESTION # 25
Which two statements are true about the candidate configuration? (Choose two.)
- A. Candidate configuration changes are automatically applied.
- B. You can discard changes before committing them.
- C. Multiple users cannot modify the same candidate configuration.
- D. You can deploy multiple changes at the same time.
Answer: B,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 # 26
Click the Exhibit button.
Referring the exhibit, what does the highlighted number indicate?
- A. hop count is 5
- B. route preference is 5
- C. cost is 5
- D. metric is 5
Answer: B
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 # 27
Which criteria does the Junos OS use to select an active route when two entries exist in the routing table?
- A. the most recently learned dynamic route
- B. the route with the lowest preference number
- C. the route with the highest preference number
- D. the route with the highest metric
Answer: B
Explanation:
In Junos OS, when two entries for the same destination exist in the routing table, the route with the lowest preference number is selected as the active route. This preference number, also known as the route preference or administrative distance, is used to prioritize routes received from different routing protocols.
NEW QUESTION # 28
You received a new Junos device and are configuring the system-related settings. You must configure this device for the current date and time on the US West coast. You have set the time zone to America/Los_Angeies. however the time and date did not change.
In this scenario, which two additional actions would satisfy this requirement? (Choose two.)
- A. Configure an NTP server.
- B. Configure a DNS server.
- C. Reboot the device.
- D. Set the date and time setting manually.
Answer: A,D
Explanation:
When configuring the system-related settings for the current date and time on a Junos device, especially for a specific time zone like America/Los_Angeles, and the time does not automatically adjust, two effective actions can be taken. Firstly, setting the date and time manually allows for immediate correction of the system clock. This can be done via the CLI with the appropriate set date and time command. Secondly, configuring the device to use an NTP server can provide ongoing synchronization with an accurate time source, ensuring that the device maintains the correct time and date automatically in the future, even in the case of restarts or minor drifts in the internal clock.
NEW QUESTION # 29
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?
- A. You must commit the configuration before any output will be shown.
- B. There are no changes to the candidate configuration.
- C. Someone accidentally deleted the active configuration.
- D. The command only works for interface configuration differences.
Answer: B
Explanation:
If issuing the "show | compare" command in configuration mode yields no output, it indicates that there are no changes to the candidate configuration (B). This command is used to compare the current candidate configuration with the active configuration, and a lack of output suggests that the candidate configuration matches the active one, meaning no changes have been made or the changes have already been committed.
NEW QUESTION # 30
Which character is used to filter the command output in the Junos CLI?
- A. |
- B. >
- C. <
- D. ?
Answer: A
Explanation:
In the Junos CLI, the pipe character | is used as a filter operator to refine command output. This operator can be combined with various filtering commands like match, except, count, etc., to display only the relevant portions of the command output. For example, using | match <pattern> filters the output to show only the lines that contain the specified pattern, making it easier to find specific information within extensive command output. This functionality is especially useful in managing and troubleshooting complex configurations and network states, allowing for more efficient analysis of the device's operational status and configuration details.
NEW QUESTION # 31
What are two link-state routing protocols? (Choose two.)
- A. RIP
- B. BGP
- C. IS-IS
- D. OSPF
Answer: C,D
Explanation:
Link-state routing protocols are a type of routing protocol used in packet-switching networks for finding the best path between source and destination. OSPF (Open Shortest Path First) and IS-IS (Intermediate System to Intermediate System) are both examples of link-state routing protocols. They work by maintaining a complete map or topology of the network, allowing routers to independently calculate the best path to each destination.
Unlike distance-vector protocols like RIP, link-state protocols are more efficient and scalable, making them suitable for larger networks.
NEW QUESTION # 32
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