Question # 1 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. Upgrade the Junos OS to the latest version.D. Hit the space bar and enter recovery when prompted.E. Use a console connection to reboot the device.
Click for Answer
A. Enter and commit the new root password.D. Hit the space bar and enter recovery when prompted.E. Use a console connection to reboot the device.
Answer Description 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.
Question # 2 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. Set the date and time setting manually.B. Configure an NTP server.C. Configure a DNS server.D. Reboot the device.
Click for Answer
A. Set the date and time setting manually.B. Configure an NTP server.
Answer Description 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.
Question # 3 An administrator configures a router's interface with an IPv4 address and subnet mask. The administrator also confirms that this interface is in an up state.
In this scenario, which two route types are created on the local router? (Choose two.) A. a static routeB. a local routeC. a dynamic routeD. a direct route
Click for Answer
B. a local routeD. a direct route
Answer Description When an interface on a router is configured with an IPv4 address and is in an up state, two types of routes are automatically created in the routing table: a local route and a direct route, making B and D the correct answers. The local route represents the interface's IP address itself, indicating that the router can directly receive packets addressed to this IP. The direct route represents the subnet or network segment to which the interface is connected, indicating that the router can directly forward packets to destinations within this subnet.
Question # 4 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 stores all routes and prefixes from all protocols.C. The forwarding table is used by the RE to select the best route.D. The routing table stores all routes and prefixes from all protocols.
Click for Answer
A. The routing table is used by the RE to select the best route.D. The routing table stores all routes and prefixes from all protocols.
Answer Description 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.
Question # 5 You want to find out the chassis serial number of a Junos device.
Which command would display this information? A. show chassis environmentB. show chassis hardwareC. show chassis routing-engineD. show chassis location
Click for Answer
B. show chassis hardware
Answer Description Explanation:
The show chassis hardware command in Junos OS displays detailed information about the hardware installed in the device, including the chassis itself. This command provides a list of all hardware components, their serial numbers, part numbers, and version information. When looking for the chassis serial number specifically, this command is the most direct and comprehensive way to retrieve that information, as it includes the serial number of the chassis among the details provided.
Question # 6 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.
Click for Answer
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 Description 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.
Question # 7 What information would you find using the CLI help command? A. hyperlinks for remediation actionsB. a URL for accessing the technical documentationC. an explanation for specific system log error messagesD. message of the day
Click for Answer
C. an explanation for specific system log error messages
Answer Description Explanation:
The CLI help command in Junos OS provides assistance and explanations for commands, command options, and in some cases, specific system log error messages. By using the help command followed by specific keywords or messages, users can get detailed information and context for the commands they are using or errors they are encountering. This feature is particularly useful for understanding the purpose of commands, their syntax, and troubleshooting error messages that may appear in system logs.
Question # 8 Which service does RADIUS provide? A. routingB. authenticationC. DNS resolutionD. time synchronization
Click for Answer
B. authentication
Answer Description Explanation:
RADIUS, which stands for Remote Authentication Dial-In User Service, provides authentication services for users trying to access a network. It is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service.
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