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Juniper JN0-105 Sample Questions With Answers​ 2024, Juniper JNCIA-Junos | SPOTO

The Juniper JN0-105 exam is designed for IT professionals looking to prove their expertise in Junos OS and networking fundamentals. As part of the JNCIA-Junos certification track, the exam covers essential topics like device configuration, network protocols, troubleshooting, and Junos OS management. To help candidates succeed, SPOTO offers a collection of JN0-105 Sample Questions with Answers for 2024. These sample questions are crafted to mirror the exam's difficulty and format, allowing candidates to practice and gain a better understanding of the test. By reviewing these detailed answers, you can improve your exam strategy, identify key areas for further study, and confidently prepare to pass the Juniper JNCIA-Junos certification exam.
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Question #1
You have been asked to use a 28 bit subnet mask to segment the following network block: 108.12.5.0. How many usable hosts per sub-net could you create?
A. 10 hosts
B. 14 hosts
C. 12 hosts
D. 16 hosts
View answer
Correct Answer: B

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Question #2
Which application would be suited for UDP traffic?
A. Web browsing
B. downloading a program
C. streaming television shows
D. on-line shopping
View answer
Correct Answer: C
Question #3
What is a valid multicast MAC address?
A. 00:90:69:9f:ea:46
B. ff:ff:ff:ff:ff:ff
C. 01:00:5e:28:12:95
D. 99:99:99:99:99:99
View answer
Correct Answer: C
Question #4
You must archive log messages for an extended period of time for audit and troubleshooting purposes. Which syslog setting should you configure on the Junos device in this scenario?
A. severity
B. facility
C. host
D. console
View answer
Correct Answer: C
Question #5
-- Exhibit -[edit interfaces] user@router# show ... lo0 { unit 0 { familyinet { filter { input protect-loopback; } address 192.168.100.1/32; } } } -- Exhibit -Given the configuration shown in the exhibit, what is the function of the protect-loopback filter?
A. to protect the Routing Engine
B. to protect all interfaces on the device
C. to protect the Packet Forwarding Engine
D. to protect the management interface
View answer
Correct Answer: A
Question #6
Which statement is true about PFEs?
A. A PFE receives hardware status messages from the RE
B. A PFE receives microcode updates from the RE
C. A PFE receives environmental status messages from the RE
D. A PFE receives layer 4 forwarding table updates from the RE
View answer
Correct Answer: B
Question #7
Which command will display the contents of the forwarding table?
A. show route forwarding-table
B. show forwarding
C. show configuration
D. show interfaces
View answer
Correct Answer: A
Question #8
A network administrator would like to view detailed interface status, properties, statistics, errors, and CoS packet counters. Which operational command will display this information?
A. show interfaces extensive
B. show interfaces
C. show configuration interfaces
D. show interface status
View answer
Correct Answer: A
Question #9
Which command will drop a matching packet and send out a notification message?
A. set routing-options static route 10
B. set routing-options static route 10
C. set routing-options static route 10
D. set routing-options static route 10
View answer
Correct Answer: C
Question #10
How many host addresses are available in the 172.27.0.0/28 network?
A. 6
B. 30
C. 28
D. 14
View answer
Correct Answer: D
Question #11
In Ethernet networks, duplex mismatches will lower performance. Which error statistics can be seen if a duplex mismatch is present?
A. collisions on the full-duplex side; runts on the half-duplex side
B. collisions on the full-duplex side; collisions on the half-duplex side
C. collisions on the half-duplex side; framing errors on the full-duplex side
D. collisions on the half-duplex side; giants on the full-duplex side
View answer
Correct Answer: C
Question #12
Which operational command would you use to quickly verify the state of all interfaces?
A. show interfaces terse
B. show interfaces
C. show configuration interfaces
D. show interface status
View answer
Correct Answer: A
Question #13
Which set of IP addresses are in the same subnet?
A. 185
B. 185
C. 185
D. 185
View answer
Correct Answer: D
Question #14
During a password recovery, what is the next step after configuring the system to boot into single-user mode?
A. Reset the root password
B. Press the space bar
C. Type recovery
D. Press the "Enter" key
View answer
Correct Answer: C
Question #15
Which network mask is the equivalent of 255.255.248.0?
A. /20
B. /21
C. /22
D. /23
View answer
Correct Answer: B
Question #16
Which statement is true about a routing table?
A. It contains routes learned dynamically only
B. It finds the best path to each destination by using a modified shortest-path-first calculation
C. It contains only active BGP routes
D. It contains all accepted routes to all destinations
View answer
Correct Answer: D
Question #17
Which J-Web tab do you use to add licenses to the device?
A. "Configure"
B. "Troubleshoot"
C. "Monitor"
D. "Maintain"
View answer
Correct Answer: D
Question #18
-- Exhibit -[edit class-of-service] user@router# show interfaces { ge-0/0/2 { unit 0 { classifiers { inet-precedence default; } } } } -- Exhibit -Referring to the exhibit, which type of classifier is being used in this CoS configuration?
A. behavior aggregate
B. policer
C. multifield
D. forwarding policy
View answer
Correct Answer: A
Question #19
What is the default firewall filter behavior when a term is matched but no terminating action is specified?
A. An implicit deny and the filter evaluation continues to the next term
B. An implicit accept and the filter evaluation continues to the next term
C. An implicit accept and the filter evaluation terminates
D. An implicit deny and the filter evaluation terminates
View answer
Correct Answer: C
Question #20
What are two reasons why a route might be hidden? (Choose two.)
A. route preference
B. routing loop
C. invalid next hop
D. routing policy
View answer
Correct Answer: CD
Question #21
Which statement is true regarding an Ethernet collision domain?
A. If a router is used, the collision domain includes all devices connected to the router
B. If a hub is used, the collision domain is limited to each device and the hub
C. If a switch is used, the collision domain is limited to each device and the switch
D. If a bridge is used, the collision domain includes all devices connected to the bridge
View answer
Correct Answer: C
Question #22
Which command displays the egress interfaces selected on the PFE for destination prefixes?
A. show route forwarding-table
B. show route table
C. show route table extensive
D. show pfefwdd
View answer
Correct Answer: A
Question #23
What represents the decimal equivalence of 11100111?
A. 195
B. 223
C. 230
D. 231
View answer
Correct Answer: D
Question #24
There are three static routes in the routing table that need to be announced to your OSPF peers. Which method is used to accomplish this?
A. Apply an import policy to OSPF that injects the static routes into OSPF
B. Apply an import policy to the static routes that injects the static routes into OSPF
C. Apply an export policy to the static routes that injects the static routes into OSPF
D. Apply an export policy to OSPF that injects the static routes into OSPF
View answer
Correct Answer: D
Question #25
Which two statements are true about the forwarding table? (Choose two.)
A. The forwarding table lists each source protocol and preference for each destination
B. The forwarding table contains only active routes
C. The forwarding table is used to process transit packets
D. The forwarding table is stored in compact flash
View answer
Correct Answer: BC
Question #26
Which two statements are correct regarding default protocol preference values? (Choose two.)
A. OSPF internal routes have a lower preference than static routes
B. Both direct and local routes have the same preference value
C. OSPF's preference value is lower than BGP
D. OSPF has a single preference value for both internal and external routes
View answer
Correct Answer: BC
Question #27
-- Exhibit -user@router> show route inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden) + = Active Route, - = Last Active, * = Both 10.10.10.91/32 *[Direct/0] 00:09:40 >via lo0.0 10.10.10.92/32 *[OSPF/10] 00:01:50, metric 1 >to 172.16.1.2 via ge-0/0/2.0 100.100.1.0/24 *[Static/5] 00:01:50 Reject 172.16.1.0/24 *[Direct/0] 00:06:09 >via ge-0/0/2.0 172.16.1.1/32 *[Local/0] 00:06:09 Local via ge-0/0/2.0 192.168.0.0/16 *[Aggregate/130] 00:00:06 Reject 192.168.0.0/17 *[Aggregate/130] 00:00:06 >to 17
A. 192
B. 192
C. 192
D. 192
View answer
Correct Answer: D
Question #28
-- Exhibit -[edit interfaces ge-0/0/1] user@router# show unit 100 { vlan-id 100; family inet { address 10.1.1.1 /24; } } [edit interfaces ge-0/0/1] user@router# commit check [edit interfaces ge-0/0/1] 'unit 100' Only unit 0 is valid for this encapsulation error: configuration check-out failed -- Exhibit -Referring to the exhibit, you are unable to commit the configuration for the ge-0/0/1 interface. What must you do to commit the configuration?
A. You must set the encapsulation vlan-ccc parameter under the [edit interfaces ge-0/0/1 unit 100] hierarchy
B. You must set the vlan-tagging parameter under the [edit interfaces ge-0/0/1] hierarchy
C. You must use the rename command to change unit 100 to unit 0
D. You must set the encapsulation flexible-ethernet-services parameter under the [edit interfaces ge-0/0/1] hierarchy
View answer
Correct Answer: B
Question #29
You need to control SSH, HTTP, and Telnet access to an MX240 router through any interface. You have decided to use a firewall filter. How should you apply the firewall filter?
A. as an outbound filter on interface fxp0
B. as an outbound filter on interface lo0
C. as an inbound filter on interface fxp0
D. as an inbound filter on interface lo0
View answer
Correct Answer: D
Question #30
You have received a default route through BGP from your ISP and you want to redistribute it into OSPF. Which method will accomplish this?
A. Apply an export policy to OSPF that exports the default route
B. Apply an import policy to OSPF that imports the default route
C. Apply the default-network command to OSPF
D. Apply the redistribute-igp command to BGP
View answer
Correct Answer: A
Question #31
What does the "3" in Junos version 14.2R3.2 represent?
A. a single-threaded version of the Junos OS
B. a major release number
C. a minor release number
D. a service build number
View answer
Correct Answer: C
Question #32
Click the Exhibit button Referring to the exhibit, what will happen to traffic that is less than the bandwidth limit from source address 1.0.0.207
A. The traffic will be discarded by the policer
B. The traffic will be accepted by term 2
C. The traffic will be discarded by term 1
D. The traffic will be accepted by term 1
View answer
Correct Answer: D
Question #33
Which two statements are correct about the inet.0 routing table? (choose two.)
A. It is used for populating the Ethernet switching table
B. It stores information learned from routing protocols and other sources
C. It is used for populating the forwarding table
D. It is used for populating the forwarding policy
View answer
Correct Answer: BC
Question #34
Which two statements describe the default behavior for OSPF? (Choose two)
A. OSPF imports all routes into the inet4
B. OSPF exports all static routes into the OSPF database
C. OSPF imports all routes into the inet
D. OSPF does not export static routes into the OSPF database
View answer
Correct Answer: CD
Question #35
Which two statements are true regarding dynamic routing? (Choose two)
A. Dynamic routing is used when absolute control of routing parameters is necessary
B. Dynamic routing allows a device to automatically reroute traffic around a failure
C. Participating devices dynamically learn routing information from each other
D. Dynamic routing requires more administrative overhead than static routing
View answer
Correct Answer: BC
Question #36
Refer to the exhibit. A customer reports that they have recently lost connectivity to a remote site over a shared architecture. Referring to the exhibit, what is the problem?
A. The remote link is down
B. The remote router has been powered off
C. The authentication method or key has been changed
D. The remote site router has been configured for OSPF
View answer
Correct Answer: C
Question #37
Which TWO of the following are private IP addresses?
A. 12
B. 168
C. 172
D. 172
E. 192
View answer
Correct Answer: C
Question #38
Which process in the Junos OS is responsible for device management tasks including the CLI and commit operations?
A. mgd
B. chassisd
C. dcd
D. rpd
View answer
Correct Answer: A
Question #39
Which three benefits occur when operating an interior gateway protocol (IGP) in an autonomous system (AS)? (Choose three.)
A. IGPs learn prefixes in the global Internet's routing table
B. IGPs react very fast to network change
C. IGPs automatically distribute static routing information
D. IGPs determine the optimal paths for data transmission
E. IGPs learn everything about the subnets and best paths within your network
View answer
Correct Answer: BDE
Question #40
Which address correctly represents a valid abbreviation for the 2bfc:0000:0000:0000:0217:0000:fe8c:5c85/128 IPv6 address?
A. 2bfe::217:0:fe8c:5c85/128
B. 2bfe:0:217:-fe8c:5c85/128
C. 2bfe::0217::fe8e:5e85/128
D. 2bfe:0:217:0:fe8e:5?5/128
View answer
Correct Answer: A
Question #41
Click the Exhibit button. Referring to the exhibit, which statement is correct?
A. The device will attempt to authenticate using the local database if RADIUS and TACACS+ are unresponsive
B. The device will never attempt to authenticate using the local database
C. The device will attempt to authenticate using RADIUS and TACACS+ at the same time
D. The device will randomly select the authentication method used for each new login attempt
View answer
Correct Answer: A
Question #42
A packet enters a Junos device. No matching destination entry exists in the forwarding table. How will the device respond?
A. The RE responds to the source with a destination unreachable notification message
B. The PFE responds to the destination with a source unreachable notification message
C. The PFE responds to the source with a destination unreachable notification message
D. The RE responds to the destination with a source unreachable notification message
View answer
Correct Answer: B
Question #43
Which command displays all IPv6 routes in the default routing instance?
A. show route table inet6
B. show route table inet
C. show route table inet
D. show route table inet6
View answer
Correct Answer: A
Question #44
Which two statements are correct regarding Layer 2 network switches? (Choose two.)
A. witches flood broadcast traffic
B. witches are susceptible to traffic loops
C. witches do not learn MAC addresses
D. witches create a single collision domain
View answer
Correct Answer: AD
Question #45
You are asked to convert the number 7 from decimal to binary. Which number is correct in this scenario?
A. 00010000
B. 11100000
C. 00000111
D. 00001000
View answer
Correct Answer: C
Question #46
What are two configurable physical interface properties? (Choose two.)
A. MTU
B. address
C. protocol family
D. link mode
View answer
Correct Answer: AC
Question #47
You issue a "request system zeroize" command. Which statement is correct in this scenario?
A. All data files remain unchanged but all configuration settings returned to factory defaults
B. All data files are deleted and all configuration settings are returned to factory defaults
C. All data files are deleted and all configuration settings remain unchanged
D. Disk space is freed by rotating log files and a proposed list of files to be deleted is presented
View answer
Correct Answer: B
Question #48
You have configured some interfaces on a Junos device; however, you have not yet committed the configuration. What happens if you issue the rollback 0 command in this scenario?
A. The messages
B. The interface changes you made are discarded
C. The factory default configuration is loaded
D. The Junos device is rebooted
View answer
Correct Answer: B
Question #49
Click the Exhibit button. Referring to the exhibit, which statement is correct about traffic received on the ge-0/0/1.0 interface?
A. All traffic will be silently dropped
B. All traffic will be accepted
C. All traffic will be dropped and a UDP message sent back to the source
D. All traffic will be dropped and an ICMP notification sent back to the source
View answer
Correct Answer: C
Question #50
Refer to the exhibit. You asked to create a firewall filter to count IPv6 packets that arrive with a no next header value. As shown in the exhibit, you have created and applied the count-no-header firewall filter to the ge-0/0/0 interface. The commit operation fails. What is causing this problem?
A. IPv6 interfaces do not support firewall filters
B. The filter name must be different than the counter name
C. The firewall term does not include inet6 in the from statement
D. The firewall family is not correct
View answer
Correct Answer: D
Question #51
Which three statements are true about IPv6 linl local addresses? (Choose three.)
A. They begin with the prefix fe80::/64
B. They can be assigned manually or dynamically
C. They are not guaranteed to be unique outside of the network segment
D. They are optional adddresses
E. They provide reachability to the internet
View answer
Correct Answer: ABC

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