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Refer to the Exhibit Practice Questions

Practise Juniper Networks Certified Associate Junos JNCIA-Junos practice questions — original exam-style scenarios covering every exam domain, with detailed explanations, wrong-answer analysis, and common exam traps.

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JNCIA-JUNOS
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Juniper Networks
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Scenario guide

How to approach refer to the exhibit practice questions

Practise exhibit-style questions that ask you to read a topology, table, command output or diagram before choosing the best answer.

Quick answer

Exhibit-style questions test whether you can read a topology, command output, diagram or table before choosing the best answer.

How to extract the relevant detail from an exhibit.

How topology, command output or routing information affects the answer.

How to avoid answering from memory before reading the evidence.

How to map the exhibit back to the exam objective.

Related practice questions

Related JNCIA-JUNOS topic practice pages

Scenario questions usually connect to one or more exam topics. Use these links to review the underlying concepts behind the scenario.

User Interfaces practice questions

Practise JNCIA-JUNOS questions linked to User Interfaces.

Junos Configuration Basics practice questions

Practise JNCIA-JUNOS questions linked to Junos Configuration Basics.

Operational Monitoring and Maintenance practice questions

Practise JNCIA-JUNOS questions linked to Operational Monitoring and Maintenance.

Routing Fundamentals practice questions

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Networking Fundamentals practice questions

Practise JNCIA-JUNOS questions linked to Networking Fundamentals.

Junos OS Fundamentals practice questions

Practise JNCIA-JUNOS questions linked to Junos OS Fundamentals.

JNCIA-JUNOS fundamentals practice questions

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JNCIA-JUNOS scenario practice questions

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JNCIA-JUNOS troubleshooting practice questions

Practise JNCIA-JUNOS questions linked to JNCIA-JUNOS troubleshooting.

Practice set

Practice scenarios

Question 1easymultiple choice
Full question →

Based on the exhibit, which protocol is enabled on interface ge-0/0/0.0?

Exhibit

Refer to the exhibit.

user@router> show interfaces ge-0/0/0.0
  Logical interface ge-0/0/0.0 (Index 70) (SNMP ifIndex 521)
    Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
    Input packets : 1500
    Output packets: 1200
    Security: Zone: Trust
    Allowed host-inbound traffic : any-service
    Protocols:
      inet:
        10.0.0.1/24
      iso:
      mpls:
        Maximum labels: 3
      multiservice:
        encapsulation: ethernet-ccc
Question 2mediummultiple choice
Review the full routing breakdown →

Refer to the exhibit. How many next hops are configured for the 192.168.1.0/24 route?

Exhibit

Refer to the exhibit.

user@router> show route protocol static

inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.1.0/24     *[Static/5] 00:10:00, metric2 0
                    > to 10.0.0.1 via ge-0/0/0.0
                    [Static/5] 00:05:00, metric2 0
                      to 10.0.0.2 via ge-0/0/1.0

192.168.2.0/24     *[Static/5] 00:15:00, metric2 0
                    > to 10.0.0.1 via ge-0/0/0.0
Question 3hardmultiple choice
Study the full IPv6 explanation →

Refer to the exhibit. An engineer configures a new IPv6 address on ge-0/0/0 unit 0 by entering the following commands in configuration mode:

set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8::2/64 commit

After the commit, the engineer runs 'show interfaces terse ge-0/0/0' and sees only the two original addresses. What is the most likely cause?

Exhibit

Refer to the exhibit.

user@router> show configuration interfaces ge-0/0/0
unit 0 {
    family inet {
        address 10.0.0.1/24;
    }
    family inet6 {
        address 2001:db8::1/64;
    }
}

user@router> show interfaces terse ge-0/0/0
Interface               Admin Link Proto    Local                 Remote
ge-0/0/0                up    up   inet     10.0.0.1/24
                                   inet6    2001:db8::1/64
Question 4easymultiple choice
Full question →

Refer to the exhibit. What is the purpose of the 'family inet6' configuration on interface ge-0/0/0?

Exhibit

Refer to the exhibit.

user@router> show configuration interfaces ge-0/0/0
unit 0 {
    family inet {
        address 10.1.1.1/30;
    }
    family inet6 {
        address 2001:db8::1/64;
    }
}
Question 5hardmultiple choice
Full question →

Refer to the exhibit. A network engineer sees repeated 'PFE interrupt error' messages in the log for fpc0. What is the most likely impact and recommended action?

Exhibit

Refer to the exhibit.

user@router> show log messages | match "fpc0"
Dec 10 14:22:01 router fpc0 MCSCHED: PFE interrupt error, restarting...
Dec 10 14:22:05 router fpc0 MCSCHED: PFE interrupt error, restarting...
Dec 10 14:22:09 router fpc0 MCSCHED: PFE interrupt error, restarting...
Dec 10 14:22:13 router fpc0 MCSCHED: PFE interrupt error, restarting...
Dec 10 14:22:17 router fpc0 MCSCHED: PFE interrupt error, restarting...
Question 6mediummultiple choice
Review the full routing breakdown →

Refer to the exhibit. The router has a default static route and a static route to 10.0.0.0/24. An engineer updates the next-hop for the default route from 192.168.1.1 to 192.168.1.2. Which command should the engineer use to verify that the change is active?

Exhibit

Refer to the exhibit.

user@router> show route protocol static

inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 1w2d 00:12:32, metric2 0
                    > to 192.168.1.1 via ge-0/0/0.0
10.0.0.0/24        *[Static/5] 1w2d 00:10:15, metric2 0
                    > to 10.0.0.1 via ge-0/0/1.0

user@router> show route 10.0.0.0

inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.0.0.0/24        *[Static/5] 1w2d 00:10:15, metric2 0
                    > to 10.0.0.1 via ge-0/0/1.0

user@router> show route 0.0.0.0

inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 1w2d 00:12:32, metric2 0
                    > to 192.168.1.1 via ge-0/0/0.0
Question 7hardmultiple choice
Full question →

Refer to the exhibit. An engineer runs the command but sees no output. What is the most likely reason?

Exhibit

user@router> show configuration | display set | match "ge-0/0/0"
set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.1/24
Question 8mediummultiple choice
Full question →

Refer to the exhibit. An engineer has made changes to the candidate configuration. What will happen when the engineer issues the 'commit' command?

Exhibit

Refer to the exhibit.

[edit]
user@router# show | compare
[edit interfaces ge-0/0/0 unit 0 family inet]
+ address 10.0.0.1/24;

[edit security]
+ policies {
+     from-zone trust to-zone untrust {
+         policy permit-all {
+             match {
+                 source-address any;
+                 destination-address any;
+                 application any;
+             }
+             then {
+                 permit;
+             }
+         }
+     }
+ }
Question 9easymultiple choice
Review the full routing breakdown →

Refer to the exhibit. An engineer wants to verify that static routes for 10.0.1.0/24 and 10.0.2.0/24 are present in the routing table. Based on the output, which statement is true?

Exhibit

Refer to the exhibit.
```
user@router> show route protocol static

inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.0.1.0/24     *[Static/5] 00:10:00, metric 0
                    > to 192.168.1.1 via ge-0/0/0.0
10.0.2.0/24     *[Static/5] 00:10:00, metric 0
                    > to 192.168.1.2 via ge-0/0/0.0
192.168.1.0/24  *[Direct/0] 00:15:00, metric 0
                    > via ge-0/0/0.0
```
Question 10mediummultiple choice
Review the full routing breakdown →

Refer to the exhibit. How many static default routes are configured?

Exhibit

show route protocol static

inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[Static/5] 00:10:00, metric2 0
                    > to 10.0.0.1 via ge-0/0/0.0
                    [Static/10] 00:05:00, metric2 0
                      to 10.0.0.2 via ge-0/0/1.0
Question 11hardmultiple choice
Review the full routing breakdown →

Refer to the exhibit. Which route is active for the 192.168.1.0/24 prefix?

Exhibit

show route 192.168.1.0/24

inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.1.0/24     *[OSPF/10] 01:00:00, metric 20
                    > to 10.0.0.2 via ge-0/0/0.0
                    [Static/5] 00:30:00, metric 0
                      to 10.0.0.3 via ge-0/0/1.0
Question 12mediummultiple choice
Full question →

Based on the exhibit, what is the most likely reason for the ping failure?

Exhibit

Refer to the exhibit.

user@router> show configuration interfaces ge-0/0/0
unit 0 {
    family inet {
        address 10.0.0.1/30;
    }
}

user@router> show interfaces terse ge-0/0/0
Interface               Admin Link Proto    Local                 Remote
ge-0/0/0                up    up   inet     10.0.0.1/30

user@router> ping 10.0.0.2 count 1
PING 10.0.0.2 (10.0.0.2): 56 data bytes
^C
--- 10.0.0.2 ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
Question 13hardmultiple choice
Review the full routing breakdown →

Based on the exhibit, what is the most likely impact on the router?

Exhibit

Refer to the exhibit.

user@router> show log messages | match "kernel"
Jan 10 10:00:00 router kernel: pid 1234 (rpd), uid 0, was killed: out of swap space
Jan 10 10:00:01 router kernel: pid 1235 (rpd), uid 0, was killed: out of swap space
Question 14mediummultiple choice
Full question →

Refer to the exhibit. Based on the output, what is the operational status of interface ge-0/0/0?

Exhibit

show interfaces terse ge-0/0/0
Interface    Admin Link Proto    Local                 Remote
ge-0/0/0     up    up   inet     192.168.1.1/24
Question 15hardmultiple choice
Read the full network assurance explanation →

Refer to the exhibit. An engineer notices that SNMP traffic from source 10.1.1.1 is being rejected on interface ge-0/0/1. The engineer wants to allow SNMP from this source while still blocking other SNMP traffic from the 10.0.0.0/8 range. Which change should be made?

Exhibit

Refer to the exhibit.

user@router> show configuration interfaces ge-0/0/1
unit 0 {
    family inet {
        filter {
            input BLOCK-SNMP;
        }
        address 192.168.1.1/24;
    }
}
user@router> show configuration firewall family inet filter BLOCK-SNMP
term 1 {
    from {
        source-address {
            10.0.0.0/8;
        }
        protocol udp;
        port 161;
    }
    then {
        reject;
    }
}
term 2 {
    then accept;
}

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