Junos, Associate (JNCIA-Junos) v1.0
Question 1
You committed a new configuration on a Junos router, but users report connectivity issues. You must quickly restore the previous working configuration without manually editing the candidate configuration.
Which command should you use to load the required configuration into the candidate configuration?
- A. rollback 0
- B. show | compare rollback
- C. rollback 1
- D. load override
Answer : C
Question 2
Which command would compare the candidate configuration with the active configuration before committing the changes?
-
A.
[edit]
user@router# show | compare -
B.
[edit]
user@router# rollback 0 - C. user@router> show configuration | compare rollback 0
- D. user@router> show configuration | compare
Answer : A
Question 3
You successfully committed a configuration change. You now realize an issue exists and must revert back to the previous configuration.
Which command entered in configuration mode will accomplish this task when committed?
- A. show | compare
- B. save config
- C. rollback 0
- D. rollback 1
Answer : D
Question 4
You are using the factory default configuration on a new Juniper router. You must successfully commit the configuration and activate the device.
Which component must be configured before Junos OS will allow you to accomplish this task?
- A. a system hostname
- B. a root-authentication password
- C. at least one logical interface with family inet enabled
- D. a management IP address on the fxp0 interface
Answer : B
Question 5
You are configuring a new router and want to ensure that you can recover from future misconfigurations.
In this scenario, what should you do after completing the initial configuration?
- A. Update the firmware on the router.
- B. Save the configuration as rollback 0.
- C. Create a rescue configuration.
- D. Enable automatic rollback after 10 minutes.
Answer : C
Question 6
Your switch01 device lost network connectivity after a configuration change. You must recover the device to a known working state using the rescue configuration that was previously saved. The device is only accessible using the console.
In this scenario, which command sequence will successfully restore the rescue configuration?
-
A.
-
B.
user@switch01> request system configuration rescue delete
user@switch01> reboot -
C.
-
D.
Answer : A
Question 7
You must add a large hierarchical configuration to your Junos device. You also want to completely replace the existing candidate configuration with a new configuration file.
Which command would allow you to accomplish these tasks?
- A. load merge terminal
- B. load override terminal
- C. load factory default
- D. load set terminal
Answer : B
Question 8
Which two statements are correct about logical units? (Choose two.)
- A. A physical interface can host multiple logical units.
- B. Logical units can have multiple IP addresses.
- C. Logical units are used only for management interfaces.
- D. A physical interface can host only one logical unit.
Answer : AB
Question 9
Your system administrator notified the infrastructure team that all server NICs will be moving to jumbo frames. All of the NICs used by servers are 1 gigabit. The starting frame size will be 4K. The exact frame size may change depending on testing results.
In this scenario, which choice would provide a flexible solution?
- A. Create a group that adjusts MTU size on 1 gigabit interfaces and apply at the interfaces level.
- B. Apply the MTU to each interface family for each 1 gigabit interface.
- C. Set the app-engine compute-cluster Ethernet MTU size for the Junos VM.
- D. Use the system internet-options path-mtu-discovery to dynamically adjust MTU.
Answer : A
Question 10
You manage a Junos device with 20 interfaces. Each interface requires the same description and MTU setting.
Which configuration approach would reduce repetitive commands and ensure consistency?
- A. Use the wildcard delete command to remove duplicate settings.
- B. Configure each interface individually.
- C. Use a configuration group.
- D. Use search and replace to apply settings across interfaces.
Answer : C
Question 11
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. show system storage
- B. request system storage cleanup dry-run
- C. request system zeroize
- D. request system storage cleanup
Answer : C
Question 12
According to HPE Juniper Networking, what are two recommended tasks you should perform before upgrading Junos OS on a device? (Choose two.)
- A. Delete all rollback configurations.
- B. Verify available storage space using the show system storage command.
- C. Disable all interfaces to prevent traffic during the upgrade.
- D. Back up the active current configuration.
Answer : BD
Question 13
Your team alerts you that users connected to ge-0/0/5 are experiencing intermittent slowness. You log in to the switch and want to see live, real-time traffic updates for that interface to determine whether the link is being over-utilized.
Which monitoring command should you use in this scenario?
- A. show chassis hardware
- B. monitor interface ge-0/0/5
- C. show interfaces terse
- D. show interfaces ge-0/0/5 extensive
Answer : B
Question 14
What does the user@router> clear log ospf-trace command accomplish?
- A. The ospf-trace file is deleted.
- B. Trace parameters are removed from the OSPF protocol configuration.
- C. Logging data into ospf-trace is stopped.
- D. Data in the ospf-trace file is removed and logging continues.
Answer : D
Question 15
Which two actions does the monitor traffic command perform? (Choose two.)
- A. It provides access to the tcpdump utility.
- B. It monitors traffic that originates or terminates on the local PFE.
- C. It displays real-time log information on your terminal.
- D. It monitors traffic that originates or terminates on the local RE.
Answer : AD