Juniper JN0-104 Junos, Associate (JNCIA-Junos) Online Training

Juniper JN0-104 Online Training

The questions for JN0-104 were last updated at Dec 26,2024.

Exam Code: JN0-104
Exam Name: Junos, Associate (JNCIA-Junos)
Certification Provider: Juniper
Latest update: Dec 26,2024

Question #41

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.

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Correct Answer: A

Question #42

Which two statements describe the RE on Junos OS devices? (Choose two.)

A . The RE is considered the control plane.
B . The RE forwards traffic based on its local copy of the forwarding table.
C . The RE provides hardware status messages for the PFE
D . The RE maintains the routing tables.

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Correct Answer: A, D
A, D

Explanation:

Ref: Juniper Networks Partner Solution Development Platform: Architecture of the JUNOS System

“Architecture of the JUNOS System

…

The Routing Engine operates all routing protocols and makes all routing decisions by creating a routing table that includes the best path to each destination. The router writes these paths to a forwarding table in the Routing Engine and then copies the same data to the forwarding table on the Packet Forwarding Engine (PFE) which actually forwards the packets.

…

The Control Plane

…

The control plane runs on the Routing Engine. Its role is to manage and control the behavior of the device, including the data plane and the services plane.

…”

Question #43

Which command allows multiple users to edit a configuration while conning only their unique changes?

A . configure exclusive
B . configure batch
C . configure private
D . configure dynamic

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Correct Answer: C
C

Explanation:

The configure private command allows multiple users to edit different parts of a configuration at the same time and commit only their changes or roll back, without interfering with each other’s changes. When the configure private command is used, you work in a private candidate configuration, which is a copy of the most recently committed configuration.

https://kb.juniper.net/InfoCenter/index?page=content&id=KB19653&actp=METADATA

Question #44

Which statement is true about using custom login class permissions?

A . If you allow and deny the same command, the command is denied.
B . If you allow and deny the same command, Junos OS will randomly choose the action.
C . If you allow and deny the same command, the command is allowed.
D . If you allow and deny the same command, the Junos OS will fail the commit check.

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Correct Answer: C
C

Explanation:

Understanding the Allow and Deny Statement Precedence and Matching By default, the allow-commands and allow-configuration regular expressions take precedence over deny-commands and deny-configuration expresssions. Thus, if you configure the same command for both the allow-commands and deny-commands statements, then the allow operation takes precedence over the deny operation.

Ref: User Access Privileges | Junos OS | Juniper Networks

“User Access Privileges

…

Understanding the Allow and Deny Statement Precedence and Matching

By default, the allow-commands and allow-configuration regular expressions take precedence over deny-commands and deny-configuration expresssions. Thus, if you configure the same command for both the allow-commands and deny-commands statements, then the allow operation takes precedence over the deny operation.

..,.”

Question #45

By default, which Junos directory contains the primary syslog file?

A . /var/syslog
B . /var/home
C . /var/log
D . /var/tmp

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Correct Answer: C
C

Explanation:

Ref: Junos® OS Overview for Junos OS | Juniper Networks

Page 23

“…

• /var―This directory is located either on the hard drive (device wd2) or internal flash storage. It contains the following subdirectories:

…

• /log―Contains system log and tracing files. …”

Question #46

Which two statements about routing policies are correct? (Choose two.)

A . An import policy is used to control incoming traffic on a specific interface.
B . An export policy determines the routes in the local routing table that are advertised to peers.
C . An import policy is used to control routes that are accepted by the local routing table.
D . An export policy is used to control outgoing traffic on a specific interface.

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Correct Answer: BC
BC

Explanation:

Ref: Understanding Routing Policies | Junos OS | Juniper Networks

“Understanding Routing Policies

…

Importing and Exporting Routes

Two terms―import and export―explain how routes move between the routing protocols and the routing table.

• When the Routing Engine places the routes of a routing protocol into the routing table, it is importing routes into the routing table.

• When the Routing Engine uses active routes from the routing table to send a protocol advertisement, it is exporting routes from the routing table.

…”

Question #47

You are creating a route filter that will match the network address of 192.168.64.0/24 In this scenario, which configuration statement will accomplish this task?

A . from route-filter 192.168.32.0/24 longer
B . from route-filter 152.168.128.0/24 orlonger
C . from route-filter 192.168.64.0/24 longer
D . from route-filter 192.168.64.0/24 orlonger

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Correct Answer: D

Question #48

You must recover a device by loading the rescue configuration file.

In this scenario, which command will accomplish this task?

A . {master:0}
user@router> load override rescue
B . {master:0}
user@router> rollback rescue
C . {master:0} [edit]
user@routert load override rescue
D . {master:0} [edit]
user@router# rollback rescue

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Correct Answer: D
D

Explanation:

{master:0} [edit] user@router# rollback rescue

This command is used to load the rescue configuration file on a Junos device. The "rollback rescue" command will restore the device to a previously saved backup configuration, which is stored as a rescue configuration file. This is useful in case the current configuration becomes unavailable or if the device is unable to boot properly. The "rollback" keyword indicates that we want to restore the previous configuration and the "rescue" keyword specifies that we want to restore the rescue configuration file.

It is important to note that the correct prompt for this command is in configuration mode, indicated by "[edit]" in the prompt.

Question #49

Which two statements describe firewall filters? (Choose two.)

A . Firewall filters are applied to interfaces.
B . Firewall filters are applied to security policies
C . Firewall filters provide stateless security.
D . Firewall filters provide stateful security.

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Correct Answer: A, C

Question #50

Click the Exhibit button.

You must apply the policy shown in the exhibit to readvertise BGP routes to OSPF neighbors

Which action will accomplish this task?

A . You must apply the policy as an import policy within the BGP configuration
B . You must apply the policy as an import policy within the OSPF configuration.
C . You must apply the policy as an export policy within the BGP configuration
D . You must apply the policy as an export policy within the OSPF configuration

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Correct Answer: B

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