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You want to find out the chassis serial number of a Junos device. Which command would display this information?
A. show chassis environment
B. show chassis hardware
C. show chassis routing-engine
D. show chassis location
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.
Which service does RADIUS provide?
A. routing
B. authentication
C. DNS resolution
D. time synchronization
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.
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 interface ge-0/0/0
B. monitor traffic interface ge-0/0/0
C. show interfaces ge-0/0/0 terse
D. show interfaces ge-0/0/0
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.
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.
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.
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.
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.
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