[Dec-2024] Latest JN0-105 Exam Dumps for Pass Guaranteed [Q20-Q36]

JN0-105 Juniper

admin • December 13, 2024

[Dec-2024] Latest JN0-105 Exam Dumps for Pass Guaranteed [Q20-Q36]

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[Dec-2024] Latest JN0-105 Exam Dumps for Pass Guaranteed

Reliable JNCIA JN0-105 Dumps PDF Dec 13, 2024 Recently Updated Questions

NO.20 Which two statements are correct about MAC addresses? (Choose two.)

Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.

The source and destination MAC addresses always remains static to the final destination.

The MAC address identifies the physical hardware.

Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.

MAC (Media Access Control) addresses are unique identifiers assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used to identify the physical hardware on a network. In the context of Ethernet switches, the destination MAC address in incoming frames is used to determine the appropriate output port for forwarding the frame towards its final destination. The switch does not change the destination MAC address; it uses the MAC address to make forwarding decisions within the local network segment.

NO.21 You received a new Junos device and are configuring the system-related settings. You must configure this device for the current date and time on the US West coast. You have set the time zone to America/Los_Angeies. however the time and date did not change.
In this scenario, which two additional actions would satisfy this requirement? (Choose two.)

Set the date and time setting manually.

Configure an NTP server.

Configure a DNS server.

Reboot the device.

When configuring the system-related settings for the current date and time on a Junos device, especially for a specific time zone like America/Los_Angeles, and the time does not automatically adjust, two effective actions can be taken. Firstly, setting the date and time manually allows for immediate correction of the system clock. This can be done via the CLI with the appropriate set date and time command. Secondly, configuring the device to use an NTP server can provide ongoing synchronization with an accurate time source, ensuring that the device maintains the correct time and date automatically in the future, even in the case of restarts or minor drifts in the internal clock.

NO.22 Exhibit
user@router> show route 192.168.36.1
inet.O: 5 destinations, 6 routes (5 active, 0 holddown, 0 hidden) + = Active Route, – = Last Active, * = Both
192.168.36.1/32 *[Static/5] 00:00:31
> to 10.1.1.2 via ge-0/0/10.0 [OSPF/IO] 00:02:21, metric 1 > to 10.1.1.2 via ge-0/0/10.0 Referring to the exhibit, which route(s) will be selected by Junos for packet forwarding?

The OSPF route will be selected.

The static route will be selected.

The Junos OS randomly selects one route.

The Junos OS selects both routes.

Junos OS selects routes based on the route preference (also known as administrative distance). Static routes typically have a lower route preference than OSPF routes, meaning they are more preferred. Since the static route to 192.168.36.1/32 is shown with a preference of 5, it will be selected over the OSPF route for packet forwarding, assuming no other factors such as route filters or policies affect the routing decision.

NO.23 What information would you find using the CLI help command?

hyperlinks for remediation actions

a URL for accessing the technical documentation

an explanation for specific system log error messages

message of the day

The CLI help command in Junos OS provides assistance and explanations for commands, command options, and in some cases, specific system log error messages. By using the help command followed by specific keywords or messages, users can get detailed information and context for the commands they are using or errors they are encountering. This feature is particularly useful for understanding the purpose of commands, their syntax, and troubleshooting error messages that may appear in system logs.

NO.24 How many rescue configuration files are supported on a Junos device?

Junos OS supports only 1 rescue configuration file on a device. This rescue configuration is a safeguard feature that allows network administrators to revert to a known good configuration in case of a configuration error or issue, ensuring network stability.
In Junos OS, each device supports only one rescue configuration file. The rescue configuration is a specific configuration that can be saved and later retrieved if needed. This is used as a fallback configuration that you know works and can be applied in case of an emergency or if the current configuration has issues.
Reference:
“You can create a rescue configuration file by using the request system configuration rescue save operational mode command. Each Junos OS device can have only one rescue configuration file.”

NO.25 You are logged in to a Junos OS device with SSH and issued the show protocols | compare command in the configuration, but no output is shown.
Which statement is correct in this scenario?

The command only works for interface configuration differences.

There are no changes to the candidate configuration.

Someone accidentally deleted the active configuration.

You must commit the configuration before any output will be shown.

The show | compare command in Junos OS is used to display the differences between the candidate configuration and the active configuration. If no output is shown when you issue this command, it means that there are no changes between the candidate configuration and the active configuration. This indicates that the candidate configuration is identical to the active configuration, and thus no differences are displayed.
Reference:
“The show | compare command displays the differences between the candidate configuration and the active configuration. If there are no changes, no output is displayed.”

NO.26 Which two external authentication methods does Junos support for administrative access? (Choose two.)

TACACS+

NIS

RADIUS

ACE

Junos OS supports several external authentication methods for administrative access, with TACACS+ (Terminal Access Controller Access-Control System Plus) and RADIUS (Remote Authentication Dial-In User Service) being among the most commonly used. Both TACACS+ and RADIUS are protocols that allow network devices to communicate with a central authentication server, enabling centralized control over user authentication and authorization. This centralization simplifies the management of user credentials and access policies, especially in larger networks with multiple devices.

NO.27 How many login classes are assignable to a user account?

https://www.juniper.net/documentation/us/en/software/junos/user-access-evo/user-access/topics/topic-map/junos-os-login-class.html#:~:text=You%20can%20define%20any%20number,to%20an%20individual%20user%20account.
In Junos OS, each user account can be assigned only one login class. Login classes in Junos OS define the permissions for users, controlling what they can access and modify within the system. This setup helps in maintaining a clear and secure access control mechanism.
Reference:
Junos OS Documentation on User Accounts and Login Classes.

NO.28 What are two link-state routing protocols? (Choose two.)

RIP

BGP

OSPF

IS-IS

Link-state routing protocols are a type of routing protocol used in packet-switching networks for finding the best path between source and destination. OSPF (Open Shortest Path First) and IS-IS (Intermediate System to Intermediate System) are both examples of link-state routing protocols. They work by maintaining a complete map or topology of the network, allowing routers to independently calculate the best path to each destination. Unlike distance-vector protocols like RIP, link-state protocols are more efficient and scalable, making them suitable for larger networks.

NO.29 Which two statements are correct about Junos traceoptions? (Choose two.)

Traceoptions cannot be enabled in a production environment.

Traceoptions are enabled through configuration.

Traceoptions are enabled by default.

Traceoption output, by default, is stored in /var/iog/<fiie-name>.

Traceoptions in Junos OS are used for detailed debugging and troubleshooting of protocols and processes within the system. They are not enabled by default due to the potential performance impact and volume of data generated. Instead, traceoptions are enabled through specific configuration settings under the relevant protocol or process hierarchy. This allows administrators to target their troubleshooting efforts and control the scope of logging. By default, the output generated by traceoptions is stored in files located in the /var/log directory, with the file name typically specified in the traceoptions configuration. This structured approach to logging and debugging helps in diagnosing complex issues without overwhelming the system or the administrator with irrelevant data.

NO.30 Exhibit
[edit system archival] user@router# show configuration {
transfer-on-commit; archive-sites {
“scp://[email protected] : /archive” password ## SECRET-DATA
“ftp://[email protected]:/archive” password “$9…”; ## SECRET-DATA
.
Referring to the exhibit, where are the configuration backup files stored?

Files are stored to the SCP site and the FTP site in a round-robin manner.

Files are stored to the SCP site and the FTP site simultaneously.

Files are stored to any site as selected by Junos internally.

Files are stored to the SCP site but if the transfer fails, then to the FTP site.

In Junos OS, the archival configuration under [edit system] allows for the automatic backup of configuration files to designated locations upon commit. When multiple archive-sites are specified, as shown in the exhibit with both SCP and FTP sites listed, the device does not choose between them or use them in a round-robin manner. Instead, it attempts to transfer the configuration backup files to all specified sites simultaneously upon each commit. This ensures redundancy and increases the likelihood that a backup will be successfully stored even if one of the transfer methods or destinations fails.

NO.31 Which three benefits occur when operating an interior gateway protocol (IGP) in an autonomous system (AS)?
(Choose three.)

IGPs automatically distribute static routing information.

IGPs determine the optimal paths for data transmission.

IGPs learn prefixes in the global Internet’s routing table.

IGPs react very fast to network change.

IGPs learn everything about the subnets and best paths within your network.

Operating an Interior Gateway Protocol (IGP) within an Autonomous System (AS) provides several benefits, including determining the optimal paths for data transmission (B), reacting quickly to network changes (D), and learning all about the subnets and best paths within the network (E). IGPs are designed to manage routing within a single AS efficiently, adapting to changes and ensuring data is routed through the best available paths.

NO.32 What is the primary system log file that is present in the default configuration of a Junos device?

kmd

messages

vrrp

jsrpd

In the default configuration of a Junos device, the primary system log file is “messages” (B). This log file contains a wide range of system messages, including operational status changes, system errors, and other critical information, making it a key resource for troubleshooting and monitoring the system’s health.

NO.33 What are two physical interface properties? (Choose two.)

MAC address

IP address

routing protocols

MTU

Two physical interface properties in Junos OS include the MAC address (A) and the Maximum Transmission Unit (MTU) size (D). The MAC address is a hardware identifier for the network interface, while the MTU size determines the largest packet size that the interface can transmit without needing to fragment the packet.

NO.34 Which two statements about firewall filters are correct? (Choose two.)

Firewall filters are stateless.

Firewall filters can match Layer 7 parameters.

Firewall filters are stateful.

Firewall filters can match Layer 4 parameters.

Firewall filters in Junos OS are stateless, meaning they process each packet individually without regard to the state of a connection or sequence of packets. These filters can match various packet attributes, including those at Layer 4, such as TCP and UDP port numbers. This allows for granular control over traffic based on the type of service or application. Unlike stateless filters, stateful firewalls keep track of the state of active connections and make decisions based on the context of the traffic flow, which is not a capability of Junos firewall filters.
Additionally, Junosfirewall filters primarily operate up to Layer 4 and do not natively inspect Layer 7 parameters, which involve application-level data.

NO.35 Which command modifier would you use to see all possible completions for a specific command?

detail

extensive

In Junos OS, the ? command modifier is used to display all possible completions for a specific command. This helps users understand the available options and syntax for a command they are trying to use.
Reference:
“Use the ? command modifier to display all possible completions for a specific command.”

NO.36 Which two statements are true about the PFE? (Choose two.)

The PFE implements various services such as policing, stateless firewall filtering, and class of service.

The PFE uses Layer 2 and Layer 3 forwarding tables to forward traffic toward its destination.

The PFE handles all processes that control the chassis components.

The PFE is responsible for performing protocol updates and system management.

The Packet Forwarding Engine (PFE) in Juniper Networks devices is the heart of the data plane, handling the actual forwarding of packets based on pre-computed forwarding tables. It provides several critical services to manage and control traffic flow, including policing (to enforce bandwidth limits for certain traffic types), stateless firewall filtering (to permit or deny traffic based on predefined criteria), and Class of Service (CoS) (to prioritize traffic to ensure quality of service for critical applications). The PFE utilizes both Layer 2 (MAC addresses) and Layer 3 (IP addresses) forwarding tables to make intelligent forwarding decisions, ensuring that packets are efficiently routed toward their final destination.

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Juniper JN0-105 Exam Syllabus Topics:

Topic	Details
Topic 1	Routing Policy and Firewall Filters: The topic of Routing Policy and Firewall Filters covers routing policy and firewall filters on Junos devices. Furthermore, the topic also deals with routing policies and firewall filters on a Junos device.
Topic 2	Networking Fundamentals: The topic networking fundamentals covers identifying the concepts and functionality of different fundamental elements of networking.
Topic 3	Configuration Basics: Identification of the main elements for configuring Junos devices is discussed in this topic. Moreover, it describes configuring basic components of a Junos device
Topic 4	User Interfaces: This topic delves into identifying the concepts, operation, or functionality of the Junos user interface.