(Jan-2025) Latest JN0-105 Dumps for Success in Actual Juniper Certified
Changing the Concept of JN0-105 Exam Preparation 2025
NEW QUESTION # 50
What is a benefit of using J-Web?
- A. It simultaneously manages multiple devices.
- B. It provides more advanced features than the CLI.
- C. It provides console-based management.
- D. It provides a customizable dashboard.
Answer: D
Explanation:
If you've committed a configuration and then need to revert to the previous configuration, therollback command is used. Since the incorrect IP address has not been committed, as indicated by thecommit check command being successful, issuingrollback 1will undo the changes made in the current session, which includes the accidental entry of the IP address.
NEW QUESTION # 51
You are configuring a firewall filter on a Juniper device.
In this scenario, what are two valid terminating actions? (Choose two.)
- A. 3next term
- B. 4accept
- C. 2discarD
- D. 1 count
Answer: B,C
Explanation:
In Juniper firewall filter configurations, "discard" and "accept" are two valid terminating actions for a term within a filter. The "discard" action drops the packet, preventing it from reaching its intended destination, while the "accept" action allows the packet to pass through the filter, proceeding to its next hop or destination.
"Count" is a non-terminating action that increments a counter every time a packet matches the term but does not inherently determine the packet's fate. "Next term" directs the evaluation to proceed to the next term in the filter for further processing, also a non-terminating action.
NEW QUESTION # 52
How many rescue configuration files are supported on a Junos device?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
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."
NEW QUESTION # 53
Which two addresses are included in an Ethernet frame header? (Choose two.)
- A. source MAC address
- B. destination MAC address
- C. source IP address
- D. destination IP address
Answer: A,B
Explanation:
An Ethernet frame header includes the source MAC address (B) and the destination MAC address (D). These addresses are used to deliver the frame from one Ethernet device to another directly connected Ethernet device on the same network segment. Ethernet frames do not include IP addresses, as those are part of the IP packet encapsulated within the Ethernet frame.
NEW QUESTION # 54
You issue the monitor traffic interface ge-0/0/0 command.
What will this command accomplish?
- A. It displays the MTU and MAC address for ge-0/0/0.
- B. It displays an operational summary of ge-0/0/0.
- C. It displays real-time statistics for interface ge-0/0/0.
- D. It displays a packet capture on interface ge-0/0/0.
Answer: D
Explanation:
The command "monitor traffic interface ge-0/0/0" (D) initiates a packet capture on the specified interface, allowing you to view the actual packets being transmitted and received. This is useful for troubleshooting and analyzing the traffic passing through the interface in real time.
NEW QUESTION # 55
Which two common routing policy actions affect the flow of policy evaluation? (Choose two.)
- A. next policy
- B. next term
- C. next hop
- D. community
Answer: A,B
Explanation:
In Junos OS routing policy evaluation, "next policy" (A) and "next term" (C) are common actions that affect the flow of policy evaluation. "Next policy" directs the evaluation to the next policy in the sequence, whereas "next term" moves the evaluation to the next term within the current policy, allowing for granular control over routing decisions.
NEW QUESTION # 56
Which two statements about firewall filters are correct? (Choose two.)
- A. Firewall filters are stateful.
- B. Firewall filters are stateless.
- C. Firewall filters can match Layer 4 parameters.
- D. Firewall filters can match Layer 7 parameters.
Answer: B,C
Explanation:
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.
NEW QUESTION # 57
What are two functions of the Routing Engine? (Choose two.)
- A. It evaluates firewall filters for transit traffic.
- B. It processes all management traffic.
- C. It processes transit traffic.
- D. It runs the Junos operating system.
Answer: B,D
Explanation:
The Routing Engine (RE) in Junos OS has several critical functions, including processing all management traffic (A) and running the Junos operating system (B). The RE handles system management tasks, user interfaces, system services, and routing protocol processes. It does not directly process transit traffic or evaluate firewall filters for transit traffic, as these tasks are handled by the Packet Forwarding Engine (PFE).
NEW QUESTION # 58
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 determine the optimal paths for data transmission.
- D. IGPs automatically distribute static routing information.
- E. IGPs learn everything about the subnets and best paths within your network.
Answer: B,C,E
Explanation:
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.
NEW QUESTION # 59
Which two statements are correct about firewall filters? (Choose two.)
- A. There can be multiple firewall filters.
- B. There can be only one firewall filter.
- C. "Accept" is the default action of packets that are not explicitly allowed.
- D. "Discard" is the default action of packets that are not explicitly allowed.
Answer: A,D
Explanation:
In Juniper Networks devices, firewall filters are used to control packet flow through the device. The default action for packets that do not match any of the specified criteria in the firewall filter is to discard them, enhancing network security by ensuring that only explicitly allowed traffic can pass through. Furthermore, it is possible to configure multiple firewall filters on a device, allowing for granular control over traffic based on various criteria such as source, destination, and protocol type.
NEW QUESTION # 60
Which two statements are correct about Junos traceoptions? (Choose two.)
- A. Traceoptions cannot be enabled in a production environment.
- B. Traceoption output, by default, is stored in /var/iog/<fiie-name>.
- C. Traceoptions are enabled by default.
- D. Traceoptions are enabled through configuration.
Answer: B,D
NEW QUESTION # 61
Which process in the Junos OS is responsible for maintaining routing protocols and tables?
- A. mgd
- B. chassisd
- C. dcd
- D. rpd
Answer: D
Explanation:
The Routing Protocol Daemon (rpd) in Junos OS is responsible for maintaining routing protocols and tables. It handles all routing information, including the calculation of routes and the population of the routing table, making it crucial for dynamic routing operations.
NEW QUESTION # 62
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. OSPF metric value
- B. next hop MAC address
- C. BGP local preference value
- D. next hop IP address
- E. outgoing interface name
Answer: B,D,E
Explanation:
The forwarding table in a network device requires specific information to efficiently forward traffic toward its destination. This includes the next hop IP address, which indicates the next router or device in the path to the destination. The outgoing interface name identifies the physical or logical interface through which the packet should be sent to reach the next hop. Lastly, the next hop MAC address is crucial for Layer 2 forwarding decisions, allowing the device to encapsulate the IP packet in a frame that can be understood by Ethernet or other Layer 2 protocols. OSPF metric values and BGP local preference values are used in the routing decision process to select the best path and populate the forwarding table but are not directly used by the forwarding table to forward traffic.
NEW QUESTION # 63
What are two functions of the routing protocol daemon (rpd)? (Choose two.)
- A. It generates chassis alarms.
- B. It maintains routing tables.
- C. It creates forwarding tables.
- D. It provides access to the CLI.
Answer: B,C
Explanation:
The Routing Protocol Daemon (rpd) is a critical component in Juniper Networks devices, responsible for all routing operations. It maintains routing tables, which hold information about network paths and destinations derived from various routing protocols. These tables are used to make decisions about where to send packets. Additionally, rpd generates forwarding tables based on the information in the routing tables. The forwarding tables are then used by the Packet Forwarding Engine (PFE) to actually forward packets to their next hop or final destination.
NEW QUESTION # 64
You are asked to configure your device running Junos OS to automatically archive your configuration upon commit In this scenario, which two methods are supported by the Junos OS? (Choose two)
- A. RCP
- B. SCP
- C. HTTP
- D. FTP
Answer: A,B
Explanation:
Junos OS supports multiple methods for automatically archiving configurations upon commit. Two of the supported methods are SCP (Secure Copy Protocol) and RCP (Remote Copy Protocol). These methods can be configured to save the configuration files to a remote server automatically whenever a commit is made.
Reference:
"You can configure Junos OS to automatically archive the configuration using protocols such as SCP and RCP upon commit."
NEW QUESTION # 65
When considering routing tables and forwarding tables, which two statements are correct? (Choose two.)
- A. The routing table is used by the RE to select the best route.
- B. The forwarding table stores all routes and prefixes from all protocols.
- C. The forwarding table is used by the RE to select the best route.
- D. The routing table stores all routes and prefixes from all protocols.
Answer: A,D
Explanation:
The routing table and forwarding table play distinct roles in a Junos OS device. The correct answers are A and D. The routing table (A) is used by the Routing Engine (RE) to select the best route among all the learned routes, while the routing table (D) stores all routes and prefixes learned from all routing protocols. The forwarding table, in contrast, contains only the active routes chosen by the RE and is used by the Packet Forwarding Engine for actual packet forwarding.
NEW QUESTION # 66
Which two statements about firewall filters are correct? (Choose two.)
- A. Firewall filters are stateful.
- B. Firewall filters are stateless.
- C. Firewall filters can match Layer 4 parameters.
- D. Firewall filters can match Layer 7 parameters.
Answer: B,C
Explanation:
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, Junos firewall filters primarily operate up to Layer 4 and do not natively inspect Layer 7 parameters, which involve application-level data.
NEW QUESTION # 67
Which two statements are true about the Junos OS? (Choose two.)
- A. Routing tables are stored in the forwarding plane.
- B. Exception traffic is sent to the control plane.
- C. Routing tables are stored in the control plane.
- D. Exception traffic is never sent to the control plane.
Answer: B,C
Explanation:
In Junos OS, as with many network operating systems, the control plane is responsible for processes that determine how to route traffic. This includes maintaining routing tables, which store information about network paths and protocols. Therefore, routing tables are indeed stored in the control plane.
Exception traffic refers to packets that cannot be processed by the normal fast-path processing of the Packet Forwarding Engine (PFE) in the forwarding plane, and thus are sent to the control plane for further processing. This might include packets destined for the router itself, packets that need to be fragmented, or packets that match certain firewall filter criteria, among other reasons.
Routing tables are not stored in the forwarding plane. However, the forwarding plane contains the forwarding table (sometimes referred to as the forwarding information base or FIB), which is a distilled version of the routing table optimized for fast packet forwarding. The forwarding plane uses this information to perform the actual transfer of packets across the network device interfaces.
NEW QUESTION # 68
What are two methods for navigating to configuration mode from an operational mode prompt? (Choose two.)
- A. Use the edit command.
- B. Use the quit command.
- C. Use the exit command.
- D. Use the configure command.
Answer: A,D
Explanation:
In Junos OS, to navigate from operational mode to configuration mode, you can use either theeditorconfigure command. Both commands move the CLI from operational mode, where you can view the state of the device, to configuration mode, where you can make changes to the device's configuration.
NEW QUESTION # 69
Exhibit
Exhibit
[edit]
root# set system host-name TEST_DEVICE [edit]
root# commit
[edit]
'system'
Missing mandatory statement: 'root-authentication' error: commit failed: (missing mandatory statements) [edit] root# You are configuring a new device.
Which action solves the error shown in the exhibit?
- A. configuring a password for the root account
- B. reinstalling Junos
- C. loading the factory-default configuration
- D. configuring a non-root username and password
Answer: A
Explanation:
The error message in the exhibit indicates that the root-authentication statement is missing, which is mandatory for committing the configuration. In Junos OS, it is required to set a password for the root account to commit any configuration changes. This is a security measure to ensure that unauthorized users cannot access the device's configuration mode. To solve the error shown in the exhibit, configuring a password for the root account is necessary. This can be done by using the set system root-authentication plain-text-password command, after which the user will be prompted to enter a new password for the root account.
NEW QUESTION # 70
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