Juniper JNCIA JN0-104 Questions & Answers

• Question 1:

  The user root is unable to connect to the router using SSH.

  

  Referring to the exhibit, which configuration change will correct the problem?

  A. [edit] user@router# set system services ssh root-login allow

  B. [edit] userr@outer# set system services ssh

  C. [edit] user@router# delete system services ssh

  D. [edit] use^@router# delete system services ssh root-login deny

  Correct Answer: A

  https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/ref/statement/ssh-edit- system.html

• Question 2:

  What information is provided by the help topic interface command?

  A. It displays the administration manual for the interface command.

  B. It displays usage examples for the top-ten interface commands.

  C. It displays the available options and a brief description of usage guidelines.

  D. It displays the best options to use with the interface command regarding your current configuration.

  Correct Answer: C

• Question 3:

  What is the default action for packets not matching a firewall filter?

  A. The packet will be silently discarded.

  B. The packet will be accepted.

  C. The packet will be rejected.

  D. The packet will be ignored.

  Correct Answer: A

• Question 4:

  You are asked to enable the configuration archival feature on your device running Junos OS. Which two backup scenarios exist? (Choose two.)

  A. When a user performs a commit operation.

  B. When a user logs out of the device.

  C. When a specific time interval passes.

  D. When a user logs in to the device.

  Correct Answer: AC

  Ref: Back Up Configurations to an Archive Site | Junos OS | Juniper Networks "Back Up Configurations to an Archive Site Configure the Transfer of the Active Configuration If you want to back up your device's current configuration to an archive site, you can configure the device to transfer its active configuration by FTP, HTTP, or secure copy (SCP) periodically or after each commit.

• Question 5:

  Which routing instance type is used for filter-based forwarding applications?

  A. layer2-control

  B. vpls

  C. forwarding

  D. vrf

  Correct Answer: C

• Question 6:

  In the show I compare rollback 49 command, what is the purpose of the I?

  A. The | is a shortcut to redirect output from a command line to a file.

  B. The filters the output of the show command.

  C. The | is used to represent an "either or" statement.

  D. The | changes the command from an operational command to a configuration mode command.

  Correct Answer: B

  https://www.juniper.net/documentation/us/en/software/junos/cli/topics/ref/command/pipe.html

• Question 7:

  What will the help syslog UI_DBASE_LOGOUT_EVENT command show you?

  A. It will show you the options you can use with sysiog UI_DBASE_LOGOUT_EVENT

  B. It will show you only UI_DBASE_LOGOUT_EVENT messages in the system log

  C. It will only show you syslog messages without UI_DBASE_LOGOUT_EVENT

  D. It will describe the UI_DBASE_LOGOUT_EVENT message code

  Correct Answer: D

• Question 8:

  Click the Exhibit button.

  

  Referring to the exhibit, a firewall filter is configured and applied to the ge-0/0/1 interface. In this scenario, which statement is correct?

  A. All traffic to destination 10.10.10.0/24 is accepted.

  B. All traffic entering on interface ge-0/0/1 is discarded.

  C. All traffic entering on interface ge-0/0/1 is accepted.

  D. All traffic from source 10.10.10.0/24 is accepted.

  Correct Answer: D

  if term has no "then" configured, matched packets are accepted by default

  https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/concept/firewall-filter-ex- series-evaluation-understanding.html Additionaly: if term has no "from" configured, every packet is matched to term if packet does not match any term - default term (implicit discard) is used

• Question 9:

  Click the Exhibit button.

  

  Referring to the exhibit, what happens when you filter the output of a command using the no-more parameter?

  A. The output is displayed in XML format.

  B. The output is displayed with no page breaks.

  C. The number of lines in the output are displayed.

  D. The last screen of information is displayed.

  Correct Answer: B

  Ref: | (pipe) | Junos OS | Juniper Networks

  "| (pipe)

  ...

  Description

  Filter the output of an operational mode or a configuration mode command.

  ...

  Options

  ...

  no-more Display output all at once rather than one screen at a time.

  ..."

• Question 10:

  Click the Exhibit button.

  ***Exhibit is Missing***

  UserA is currently working on routed and has issued the commands shown in the exhibit. UserB wants to update the IP address currently configured on interface xe-1/2/1.0.

  What will UserB do to complete the configuration changes without interfering with UserA's work?

  A. UserB should use the configure private option to complete the changes while UserA continues with the changes.

  B. UserB should use the configure exclusive option to complete the changes while UserA continues with the changes.

  C. Use the edit command and run the commit confirmed option then proceed with UserB's changes.

  D. Wait for UserA to finish then proceed with changes using the configure private option.

  Correct Answer: B