Get Ready with JN0-105 Exam Dumps (2024)
Realistic JN0-105 Dumps are Available for Instant Access
NEW QUESTION # 40
Click the Exhibit button.
How is traffic, sourced from 10.0.0.0/8, treated by the firewall filter shown in the exhibit?
- A. logged and rejected
- B. logged and discarded
- C. logged with no further action
- D. logged and accepted
Answer: D
Explanation:
The firewall filter configuration in the exhibit specifies a filter with two terms. Term 1 matches traffic from the source address 10.0.0.0/8 and has two actions: 'log' and 'next term'. The 'log' action will record the match to a log file, and 'next term' indicates that the firewall should evaluate the next term after logging. There is no explicit action such as 'accept' or 'reject' in term 1, so by default, the traffic will be accepted unless subsequently rejected by another term.
Term 2 has the action 'reject', which discards packets that reach this term. Since there is no 'from' condition in term 2, it acts as a default rule for all traffic not matched by term 1.
Because the traffic sourced from 10.0.0.0/8 matches term 1 and there is no reject action in that term, it will be logged and then accepted by the firewall filter. There is no subsequent term that rejects this specific traffic, so the action from term 2 does not apply to it.
NEW QUESTION # 41
You are asked to view the real-time usage statistics for the busiest interfaces on a device running Junos OS.
Which command will achieve this task?
- A. monitor traffic absolute-sequence
- B. monitor traffic
- C. monitor interface traffic
- D. show interfaces extensive
Answer: C
Explanation:
To view real-time usage statistics for the busiest interfaces on a device running Junos OS, the correct command is B, "monitor interface traffic." This command provides a dynamic, real-time view of the traffic flowing through the interfaces, allowing administrators to quickly identify and monitor the busiest interfaces on the device.
NEW QUESTION # 42
Exhibit
term limit-icmp { from {
source-address {
172.25.11.0/24;
}
protocol icmp;
}
then {
count count-icmp; discard;
}
}
Referring to the exhibit, which two actions will occur when a packet matches the firewall filter? (Choose two.)
- A. An ICMP destination unreachable message will be returned.
- B. The packet will be discarded.
- C. A counter will be incremented.
- D. The packet will be forwarded.
Answer: B
Explanation:
Referring to the firewall filter configuration in the exhibit, when a packet matches the specified term limit-icmp, two actions are defined in thethenstatement:count count-icmpanddiscard. Thecount count-icmp action means that each time a packet matches this term, a counter namedcount-icmpwill be incremented, providing a tally of how many packets have matched the term. Thediscardaction means that the packet will be dropped and not forwarded through the device. This effectively prevents the packet from reaching its intended destination. There is no action specified that would cause an ICMP destination unreachable message to be returned, nor is there any action that would allow the packet to be forwarded.
NEW QUESTION # 43
What are two advantages of using the Junos OS? (Choose two.)
- A. It enables you to roll back to a previous configuration.
- B. It supports up to a maximum of two previous configurations.
- C. It pushes your configuration changes "live" immediately.
- D. It is modular.
Answer: A,D
Explanation:
One of the key advantages of Junos OS is its ability to roll back to previous configurations. This feature allows administrators to revert to an earlier configuration state, which is invaluable for quickly recovering from configuration errors or undesired changes. Junos OS maintains an archive of previous configurations, enabling easy rollback to any saved state. Another significant advantage of Junos OS is its modular design. The operating system is structured so that different processes and services run in separate protected memory spaces, enhancing the stability and reliability of the system. If one process fails, it does not affect the others, thereby minimizing the risk of system-wide failures.
NEW QUESTION # 44
Which component is considered part of the data plane?
- A. the Routing Engine
- B. the fan tray
- C. the Packet Forwarding Engine
- D. the power supply
Answer: C
Explanation:
The Packet Forwarding Engine (PFE) is an integral component of Juniper Networks devices, responsible for the data plane operations. The data plane, also known as the forwarding plane, is where the actual processing and forwarding of packets occur based on the routing and forwarding tables. The PFE executes the forwarding decisions made by the Routing Engine (RE), handling all packet transmissions, including routing, filtering, and switching packets towards their destination. This contrasts with the control plane operations handled by the RE, which involve routing table maintenance, system management, and control protocol processing.
NEW QUESTION # 45
Which protocol is responsible for learning an IPv4 neighbor's MAC address?
- A. Neighbor Discovery Protocol (NDP)
- B. Address Resolution Protocol (ARP)
- C. Media Access Control Security (MACsec)
- D. Network Address Translation (NAT)
Answer: B
Explanation:
The Address Resolution Protocol (ARP) is a fundamental protocol used in IPv4 networking to map an IP address to its corresponding MAC (Media Access Control) address. When an IPv4 device wants to communicate with another device on the same local network, it uses ARP to find out the MAC address associated with the target device's IP address. This ensures that IP packets can be encapsulated into Ethernet frames and delivered to the correct hardware address on the local network segment. ARP does not apply to IPv6, where Neighbor Discovery Protocol (NDP) performs a similar function.
NEW QUESTION # 46
You configured your system authentication order using the set authentication-order tacplus radius password command.
Which statement is correct in this scenario?
- A. A rejection by TACACS+ will prevent a login and bypass the other two authentication methods.
- B. All authentication methods are used with the most restrictive permission set used.
- C. The password authentication will only be used if the TACACS+ and RADIUS servers fail to respond.
- D. The password authentication method is evaluated if the TACACS+ and RADIUS servers respond with a reject message.
Answer: C
Explanation:
In the scenario where the system authentication order is set to "tacplus radius password," the correct statement is (B). If the TACACS+ and RADIUS servers are unreachable or fail to respond, the system will fall back to using password authentication. This ensures that users can still authenticate using locally stored passwords if external authentication servers are unavailable.
NEW QUESTION # 47
When considering routing policies, which two statements are correct? (Choose two.)
- A. Policy terms are evaluated from top to bottom with action taken on the first match found.
- B. An import routing policy for BGP determines which received prefix advertisements are placed in the routing information base.
- C. Routing policies are applied to interfaces as input or export filters.
- D. Policy terms are evaluated from top to bottom with the most restrictive action taken of all the matching terms.
Answer: A,B
Explanation:
Routing policies in Junos OS are crucial for controlling route advertisements and path selection. The correct answers are B and C. An import routing policy for BGP determines which received prefix advertisements are placed in the routing information base (RIB), and policy terms are evaluated from top to bottom, with action taken on the first match found. This sequential evaluation allows for precise control over routing decisions.
NEW QUESTION # 48
Which two statements are correct about MAC addresses? (Choose two.)
- A. The MAC address identifies the physical hardware.
- B. The source and destination MAC addresses always remains static to the final destination.
- C. Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.
- D. Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.
Answer: A,D
Explanation:
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.
NEW QUESTION # 49
By default, how does the PFE manage unicast traffic destined for an existing forwarding table entry?
- A. It sends the traffic through the f xpl interface to the RE.
- B. It sends the traffic through one port toward its destination.
- C. It sends the traffic through multiple ports toward its destination.
- D. It sends all traffic to the control plane for further processing.
Answer: B
Explanation:
In a Juniper Networks device, the Packet Forwarding Engine (PFE) processes unicast traffic by forwarding it according to the existing entries in the forwarding table. When the PFE encounters unicast traffic destined for an address that has a corresponding entry in the forwarding table, it directs the traffic through a specific outgoing interface or port toward its destination. This process is based on the most efficient path determined by the routing protocols in use, ensuring that the packet reaches its intended destination through a singular path, unless specific configurations such as load balancing are in place.
NEW QUESTION # 50
What is a benefit of using J-Web?
- A. It provides more advanced features than the CLI.
- B. It simultaneously manages multiple devices.
- C. It provides a customizable dashboard.
- D. It provides console-based management.
Answer: C
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
Which two components are included in a transport header? (Choose two.)
- A. source port number
- B. destination port number
- C. source MAC address
- D. destination MAC address
Answer: A,B
NEW QUESTION # 52
Which two fields are you required to enter when you create a new user account? (Choose two.)
- A. login class
- B. user ID
- C. full name
- D. username
Answer: A,D
Explanation:
In Junos OS, when creating a new user account, the minimum required fields are theusernameand thelogin class. The username is the identifier for the account, while the login class specifies the level of access or permissions the user has on the device. Login classes allow for the differentiation between various roles, such as read-only access or full administrative rights. Other information, such as full name or user ID, is optional and not strictly necessary for the creation of a functional user account.
NEW QUESTION # 53
Which two statements are true about the candidate configuration? (Choose two.)
- A. Multiple users cannot modify the same candidate configuration.
- B. Candidate configuration changes are automatically applied.
- C. You can deploy multiple changes at the same time.
- D. You can discard changes before committing them.
Answer: C,D
Explanation:
The candidate configuration in Junos OS is a temporary configuration that allows network administrators to make and stage multiple configuration changes before applying them to the device. This approach enables the deployment of multiple changes in a single operation, ensuring that all configurations work together as intended before making them active. Additionally, the candidate configuration can be discarded if the administrator decides not to apply the staged changes, allowing for a "trial and error" approach without affecting the currently active configuration. This feature provides flexibility and reduces the risk of disruptive changes to the network.
NEW QUESTION # 54
Which two statements apply to the Routing Engine functions? (Choose two.)
- A. It maintains the routing tables.
- B. It processes the transit traffic.
- C. It responds to ping and traceroute commands.
- D. It does not process routing updates.
Answer: A,C
Explanation:
The Routing Engine (RE) in Juniper Networks devices plays a critical role in the control plane operations. One of its functions includes responding to network utility commands like ping and traceroute, which are essential for diagnosing network connectivity and path issues. Furthermore, the RE is responsible for maintaining the routing tables, which contain information about network paths and destinations. These tables are vital for making forwarding decisions but are distinct from the actual forwarding of packets, which is handled by the Packet Forwarding Engine (PFE).
NEW QUESTION # 55
How many login classes are assignable to a user account?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
Junos OS supports multiple login classes that can be assigned to user accounts, allowing for different levels of access and permissions. The correct answer is C, 4. These classes include "super-user," "read-only,"
"operator," and "unauthorized." Each class provides a different level of access to the Junos device, ranging from full configuration and operational command privileges to limited access for monitoring and viewing configurations.
NEW QUESTION # 56
Which two statements about firewall filters are correct? (Choose two.)
- A. Firewall filters are stateless.
- B. Firewall filters can match Layer 4 parameters.
- C. Firewall filters can match Layer 7 parameters.
- D. Firewall filters are stateful.
Answer: A,B
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
Which command displays all IPv6 routes in the default routing instance?
- A. showroute table inet.0
- B. showroute table inet.l
- C. showroute table inet6.1
- D. showroute table inet6.0
Answer: D
Explanation:
In Junos OS, the command to display IPv6 routes in the default routing instance isshow route table inet6.0.
The routing tableinet6.0specifically holds IPv6 routes. The commandshow route table inet.0is used for IPv4 routes, andinet6.1orinet.l(assuminginet.lis a typo forinet.1) are not standard Junos routing tables for displaying IPv6 routes in the default routing instance.
NEW QUESTION # 58
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. outgoing interface name
- B. next hop IP address
- C. next hop MAC address
- D. BGP local preference value
- E. OSPF metric value
Answer: A,B,C
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 # 59
What is the maximum number of rollback configuration files that the Junos OS will store?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
Junos OS can store up to 50 rollback configuration files, making B the correct answer. These rollback files allow administrators to revert to previous configurations, providing a safety net that facilitates recovery from configuration errors or undesired changes
NEW QUESTION # 60
Which two common routing policy actions affect the flow of policy evaluation? (Choose two.)
- A. next policy
- B. next hop
- C. next term
- D. community
Answer: A,C
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 # 61
......
Download Exam JN0-105 Practice Test Questions with 100% Verified Answers: https://examdumps.passcollection.com/JN0-105-valid-vce-dumps.html
