[Q72-Q94] JN0-104 Certification – The Ultimate Guide [Updated 2025]

admin JN0-104 Juniper September 10, 2025

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JN0-104 Certification – The Ultimate Guide [Updated 2025]

JN0-104 Practice Exam and Study Guides – Verified By ValidExam

The JN0-104 exam consists of 65 multiple-choice questions and has a time limit of 90 minutes. JN0-104 exam covers a wide range of topics, including Junos OS fundamentals, user interfaces, routing and switching fundamentals, Ethernet switching, routing essentials, routing policy and firewall filters, Junos OS administration, and monitoring and troubleshooting Junos OS devices.

The JNCIA-Junos certification is an entry-level certification that demonstrates a candidate’s knowledge of the Juniper Networks Junos operating system. It is a prerequisite for other advanced Juniper certifications such as the JNCIS-ENT and JNCIP-ENT. The JNCIA-Junos certification is recognized globally and is highly respected in the networking industry. It is an excellent way for individuals to demonstrate their proficiency in Junos networking and to advance their careers in the field.

Q72. Which of these configuration steps are needed to create and apply an export policy that advertises static routes to RIP neighbours? (Choose two)

edit policy-options policy-statement DEMO set term 1 from protocol static accept

user@host# show protocols rip group INTERNAL export ExportStatic;

user@host# show policy-options policy-statement ExportStatic { term exportstatic1 { from protocol static; then accept; } }

set protocols rip export DEMO

Q73. Which table is used to store the protocol source for a given destination?

Routing table

Protocol table

Session table

Forwarding table

Q74. Which command do you use to show component and environmental status?

show chassis alarms

show system chassis environment

show chassis environment

show chassis status

Q75. Which two statements are true about the configure exclusive command?

It allows users to retain all uncommitted changes when exiting exclusive configuration mode.

It allows multiple users to edit private copies of the configuration concurrently.

It causes the loss of all uncommitted changes when exiting exclusive configuration mode.

It excludes other users from editing the configuration.

Q76. What will the command ping 192.168.1.1 size 5 perform?

It sends five rapid ping requests to 192.168.1.1

It sends a continuous ping with packet length of five bytes to 192.168.1.1

It sends a continuous rapid ping with a packet length of five bytes to 192.168.1.1

It sends exactly five ping requests to 192.168.1.1

Q77. Choose the acceptable modifiers to a terminating action of a firewall filter? (Choose four)

Discard

Count

Syslog

Policer

Log

Q78. Referring to the exhibit, what is the expected behavior for login attempts from users that receive a reject form from both the RADIUS and TACACS+ servers?

Users are prompted for a local authentication password.

Users are not prompted for a local authentication password.

Users are prompted for the root authentication password.

Users are granted limited access to the device using a guest account.

Q79. Which protocol is responsible for learning an IPv6 neighbor’s IMAC address?

Neighbor Discovery Protocol (NDP)

Media Access Control Security (MACsec)

Address Resolution Protocol (ARP)

Network Address Translation (NAT)

According to the Juniper Networks JNCIA-Junos Study Guide, “Neighbor Discovery Protocol (NDP) is the IPv6 equivalent of ARP in IPv4. It is responsible for learning a neighbor’s link-layer address and determining the reachability of a neighboring device.” Reference:
So, the Neighbor Discovery Protocol (NDP) is responsible for learning an IPv6 neighbor’s IMAC address.

Q80. The monitor traffic command provides access to which utility?

tcpdump

telnet

traceroute

netstat

Q81. Which of these about login classes are true? (Choose two)

There are five system-defined login classes

Users can belong to multiple login classes

Q82. Click the Exhibit button

Referring to the exhibit, which two statements are correct? (Choose two.)

All other traffic from the Web destined to 172.19.20.50 is accepted.

All other traffic from the Web destined to 172.19.20.50 is discarded

The HTTP traffic destined to 172.19.20.50 is accepted.

The HTTP traffic from source 172.19.20.50 is accepted.

Q83. What does the output of the show route forwarding-table command display?

The routing protocol databases in the Routing Engine.

The inactive entries in the Routing Engine’s routing table.

The Routing Engine’s forwarding table.

The Packet Forwarding Engine routing table.

Q84. Click the Exhibit button.

Your Junos device is using the configuration shown in the exhibit. You notice that the 172.17.23.10/30 address Is Incorrect and should be 172.17.23.9/30.
What are two commands that would solve this problem? (choose two.)

[edit interfaces]
use reroute r# delete ge-0/0/2.0 family inet address
172-17.23.10

[edit interfaces]
user@router# rename ge-0/0/Z0 family inet address
172.17.23-10/30 to address 172.17.23.9/30

[edit interfaces]
user@router= replace pattern 17Z1723.10 with
172.17.23.9

[edit interfaces]
user@router# set ge-0/0/2.0 family inet address

Q85. Which of these routing tables stores IPv4 unicast routes and is used by multicast routing protocols to prevent loops?

inet.3

inet.2

inet.0

inet.1

Q86. Click the Exhibit button

You are capturing logs to troubleshoot an issue with IS-IS; however, the logs are increasing in size too quickly.
Referring to the exhibit, which configuration statement would solve this problem?

set protocols isis traceoptions flag hello detail

set protocols isis traceoptions file files 10

delete protocols isis traceoptions flag normal

delete protocols isis traceoptions file is-is-logs.log

Q87. You want to upgrade between two different Junos OS releases with no disruption to the control plane.
Which software upgrade command should you perform?

request system software validate

request system software add

request system software in-service-upgrade

request system software delete-backup

Q88. Which command will gracefully shut down a router from the Junos CLI?

Request system shutdown

Shutdown now

Request system halt

Shutdown -r now

Q89. You are troubleshooting a problem on your Junos device. You want to view the syslog messages in real-time on your terminal.
In this scenario, which command will accomplish this task?

monitor log messages

monitor start messages

show log messages

show log traceoptions

Q90. The auto-complete feature in the Junos CLI is triggered by which methods?

pressing the Spacebar for both command and variable completion

pressing the Spacebar for only command completion and the Tab key for only variable completion

pressing the Spacebar for only variable completion and the Tab key for only command completion

pressing the Tab key for both variable and command completion and the Spacebar for command completion

Q91. Which two statements are true regarding routing tables?

The routing table is populated by the forwarding table.

Devices running the Junos OS can accommodate multiple routing tables.

Information learned from routing protocols is stored in the routing table.

The primary routing table for IPv4 unicast routes is inet.4.

Q92. Which of these allows the communication packets to exceed the smallest MTU (Maximum Transmission Unit)? (Choose two)

packet parallelization

packet serialisation

packet segmentation

packet sequencing

Q93. Which two statements are correct regarding logical units on Junos devices? (Choose two.)

Logical units are always required for any interface configured with logical addresses such as IPv4 and IPv6.

Ethernet interfaces can be configured to use any logical unit number, regardless of whether 802.1Q VLAN tagging is enabled.

Logical unit numbers must match the DLCI or VCI numbers configured on the interfac

Logical unit 0 is the only value allowed on interfaces running HDLC or PPP encapsulations.

Q94. Click the Exhibit button.

Your Junos device is using the configuration shown in the exhibit. You notice that the 172.17.23.10/30 address Is Incorrect and should be 172.17.23.9/30.
What are two commands that would solve this problem? (choose two.)