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Juniper JN0-104 Sample Question Answers
Question # 1
Which routing instance type is used for filter-based forwarding applications?
A. layer2-control B. vpls C. forwarding D. vrf
Answer: C
Explanation: The forwarding routing instance type is used for filter-based forwarding
applications, such as policy-based routing and traffic engineering. This type of routing
instance is used when the routing table needs to contain more detailed information than
what is available in the default routing table. According to the Juniper Networks Technical
Certification Program (JNTCP) documents[1], the forwarding routing instance type is used for filter-based forwarding applications.
Question # 2
Which command allows you to execute operational mode commands while in configuration
mode?
You must verify that interface ge-0/0/0.0 is administratively up and that the link is up.
In this scenario, which command will accomplish this task?
A. show configuration interfaces ge-0/0/0.0 B. show chassis fpc pic-status C. show system information D. show interfaces terse
Answer: D
Explanation: Ref: show interfaces | Junos OS | Juniper Networks
“show interfaces
…
Sample Output
…
show interfaces terse
user@host> show interfaces terse
Interface Admin Link Proto Local Remote
ge-0/0/0 up up
ge-0/0/0.0 up up inet 10.209.4.61/18
gr-0/0/0 up up
…”
Question # 4
Which two statements about exception traffic processing are correct? (Choose two.)
A. When congestion occurs, only exception traffic is given preference. B. By default, a rate-limiter for exception traffic exists on the internal link between the
control plane and the forwarding plane C. When congestion occurs, local and control traffic are given preference. D. By default, no rate-limiter for exception traffic exists on the internal link between the control plane and the forwarding plane.
A. to maintain the forwarding tables B. to apply the class of service function C. to forward transit traffic D. to monitor the chassis
Answer: B,C
Question # 6
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
Answer: D
Question # 7
Which two operating systems are used as the foundation of the Junos OS? (Choose two.)
A. Ubuntu B. CentOS C. Linux D. FreeBSD
Answer: C,D
Question # 8
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.
Answer: A,B,C
Question # 9
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.
Answer: A,C
Question # 10
Which system-defined user class is able to perform all operations on a device?
A. operator B. authorized C. read-write D. super-user
Answer: D
Question # 11
What are two characteristics of UDP? (Choose two.)
A. UDP is connection-oriented. B. UDP packets are sent best-effort. C. UDP is more reliable than TCP. D. UDP operates at the transport layer.
Answer: B,D
Question # 12
Host A is communicating with Host B through a Layer 2 switch.
What is the highest layer that the switch will inspect the traffic in this scenario?
A. Data Link B. Transport C. Network D. Session
Answer: A
Question # 13
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.
Answer: B,C 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 # 14
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.
Answer: C
Question # 15
Which statement describes the ulst next-hop type that appears in the output of the show
route forwarding-table command?
A. A list of unicast or multicast forwarding entries waiting to be resolved. B. A list of unicast destination prefixes for which packets will be silently discarded C. A list of unicast next hops used for a given destination for which load balancing is
enabled D. A list of unicast or multicast destination prefixes for which packets will be silently
discarded.
Answer: C
Question # 16
What is the network ID address of the IPv4 subnet that includes the IP address
114.180.192.120/28?
A. 114.180.192.118/28 B. 114.180.192.100/28 C. 114.180.192.112/28 D. 114.180.192.106/28
Answer: C
Question # 17
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. host B. facility C. console D. severity
Answer: A
Question # 18
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
Answer: 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 # 19
What are two functions of the transport layer? (Choose two.)
A. data integrity B. segmentation C. flow control D. packet forwarding
Answer: B,C
Explanation:
The transport layer is responsible for ensuring the reliable delivery of data between
applications running on different devices. It provides two main functions:
B. Segmentation: The transport layer is responsible for dividing large data payloads into
smaller segments that can be transmitted over the network. This allows for better utilization
of network resources and improved reliability, as errors in transmission can be detected
and corrected more easily.
C. Flow control: The transport layer is also responsible for managing the flow of data
between the sender and receiver. It monitors the receiving device's buffer capacity to
ensure that it is not overwhelmed by incoming data, and can adjust the rate at which data is
transmitted accordingly. This helps to prevent data loss and ensure the efficient use of
network resources.
These two functions are crucial for ensuring the reliable delivery of data in a network a are provided by protocols such as TCP (Transmission Control Protocol) and UDP (User
Datagram Protocol).
Question # 20
The IP address 10.1.1.1 belongs to which class of IP address space?
A. Class A B. Class B C. Class C D. Class D
Answer: A
Question # 21
Which statement is true when using the allow command and deny command attributes
when creating user permissions?
A. If you allow and deny the same commands, the Junos OS will fail the commit check. B. If you allow and deny the same command, the allow command permissions take
precedence over the deny command permissions. C. If you specify a regular expression for allow and deny with two variants of a command,
both will be ignored. D. The all login class permission bits take precedence over allow and deny when a user
issues the rollback command.
Answer: B
Question # 22
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¢85/128
Answer: A
Question # 23
Which two conditions must exist in a Junos device for traffic to transit the device to a
specific destination? (Choose two.)
A. A routing table entry for that destination must exist. B. A firewall filter must exist to allow traffic to reach that destination. C. A forwarding table entry for that destination must exist. D. A routing policy must be in place on the device.
Answer: A,C
Question # 24
Which three benefits are made possible by the separation of the control plane and
forwarding plane of a Junos device? (Choose three.)
A. nonstop active routing B. in-service software upgrades C. deep packet inspection D. stateful firewall E. graceful Routing Engine switchover
Answer: A,B,E
Explanation: "This architectural design also makes possible the incorporation of high
availability features like graceful Routing Engine switchover (GRES), nonstop active routing
(NSR), and unified in-service software upgrades (ISSUs)."https://douran.academy/wpcontent/uploads/ebooks/jnica-junos-study-guide-part1.pdf
Question # 25
Which Junos OS routing instance type is used for non-VPN-related applications such as
system virtualization?
A. vpls B. forwarding C. virtual-router D. vrf
Answer: C
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