ベスト良質なJuniper JN0-105試験問題Fast2testリアル練習試験 [2024]
重要な試験問題でJunos, Associate (JNCIA-Junos)一発合格
Juniper JN0-105 認定試験の出題範囲：
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質問 # 44
Which two components are included in a transport header? (Choose two.)
- A. source port number
- B. source MAC address
- C. destination port number
- D. destination MAC address
正解：A、C
解説：
The transport layer in the OSI model is responsible for end-to-end communication and error recovery. In a transport header, such as TCP or UDP, the key components include the source port number and the destination port number. These port numbers are used to identify sending and receiving applications. The source port number indicates the port of the sending application, and the destination port number refers to the port of the receiving application. MAC addresses, on the other hand, are part of the data link layer (Layer 2) and would be included in an Ethernet header, not a transport header.
質問 # 45
Click the Exhibit button.
Referring to the exhibit, what should be configured on R1 to advertise a default static route into OSPF?
- A. a management interface
- B. a routing policy
- C. a loopback interface
- D. a firewall filter
正解：B
解説：
To advertise a default static route into OSPF on router R1, a routing policy should be configured. This policy would typically include a statement to match the default route (0.0.0.0/0) and then apply an action to set the route as an OSPF external type, which would then be redistributed into the OSPF domain. The routing policy is a set of conditions and actions that determine how routes are imported into or exported from the routing table and how routes are shared between routing instances or routing protocols. After defining the policy, it must be applied to OSPF under the export section of the OSPF configuration on R1. This process will allow R1 to announce the default route to other OSPF routers in the network, which then can use it as a gateway of last resort to reach the Internet or other networks not explicitly known to the OSPF domain.
質問 # 46
What are two benefits when implementing class of service? (Choose two.)
- A. Traffic congestion can be managed.
- B. The network will be faster.
- C. Latency-sensitive traffic can be prioritized
- D. Traffic congestion will be eliminated.
正解：C、D
解説：
Implementing Class of Service (CoS) in a network provides numerous benefits, particularly in managing traffic based on its importance, source, or type. CoS enables network administrators to manage traffic congestion by applying various queuing techniques and policies to ensure that critical services remain unaffected during high congestion periods. Additionally, CoS allows for the prioritization of latency-sensitive traffic such as voice and video, ensuring that these services maintain quality despite varying network conditions.
質問 # 47
What does the user@router> clear log ospf-trace command accomplish?
- A. The ospf-trace file is deleted.
- B. Data in the ospf-trace file is removed and logging continues.
- C. Logging data into ospf-trace is stopped.
- D. Trace parameters are removed from the OSPF protocol configuration.
正解：B
解説：
The clear log ospf-trace command on a Juniper Networks router is used specifically to manage the contents of the log file named ospf-trace. Executing this command clears or deletes the existing data within the ospf-trace log file but does not stop the logging process. The router continues to log new OSPF-related events and data into this file after the command is executed. This functionality is crucial for troubleshooting and monitoring the OSPF (Open Shortest Path First) protocol's operation by allowing network administrators to remove old or irrelevant log data while continuously capturing new events without interruption.
質問 # 48
You want to redeploy a Junos device by clearing the existing configuration and resetting it to factory defaults.
In this scenario, which command would help to accomplish this task?
- A. request systemstorage cleanup
- B. show system storage
- C. request systemstorage cleanup dry-run
- D. request systemzeroize media
正解：D
解説：
Therequest system zeroize mediacommand on a Junos device securely erases all data, including configuration and log files, and resets the device to its factory default settings. This command is used when redeploying a device to ensure no residual data remains from its previous deployment. It's a comprehensive and secure way to clear all configurations and data, making the device as if it were new. The other commands listed do not perform a full reset to factory defaults; for example,show system storagedisplays storage information, andrequest system storage cleanupoffers to delete unnecessary files without resetting the device to factory settings.
質問 # 49
How many login classes are assignable to a user account?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
解説：
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.
質問 # 50
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 discarded
- B. logged and accepted
- C. logged with no further action
- D. logged and rejected
正解：B
解説：
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.
質問 # 51
Which two statements are correct about the empioyee@Ri> prompt? (Choose two.)
- A. You are in operational mode.
- B. R1 is the hostname of your device.
- C. You are at a shell prompt.
- D. You are in configuration mode.
正解：A、B
解説：
In Junos OS, the prompt employee@R1> indicates the current context of the user interface. The 'R1' part of the prompt signifies the hostname of the device, which in this case is 'R1'. The absence of a '#' symbol at the end of the prompt suggests that the user is in operational mode, as opposed to configuration mode which is indicated by a prompt ending in '#'. Operational mode allows users to view the status of the device and execute operational commands, but does not allow for configuration changes.
質問 # 52
You configured your system authentication order using the set authentication-order tacplus radius password command.
Which statement is correct in this scenario?
- A. The password authentication will only be used if the TACACS+ and RADIUS servers fail to respond.
- B. A rejection by TACACS+ will prevent a login and bypass the other two authentication methods.
- C. The password authentication method is evaluated if the TACACS+ and RADIUS servers respond with a reject message.
- D. All authentication methods are used with the most restrictive permission set used.
正解：A
解説：
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.
質問 # 53
Your network infrastructure transports data, voice, and video traffic. Users are complaining that voice and video calls are not performing to their expectations.
In this scenario, which technology would you implement to improve voice and video performance on your network?
- A. IPv6
- B. CoS
- C. STP
- D. NAT
正解：B
解説：
In a network that carries diverse types of traffic like data, voice, and video, ensuring the performance of latency-sensitive applications such as voice and video calls is crucial. Class of Service (CoS) is a technology designed to prioritize network traffic, ensuring that critical applications like voice and video receive the necessary bandwidth and minimal latency. CoS mechanisms can include traffic classification, traffic policing, queue management, and scheduling. By implementing CoS, network administrators can assign higher priority to voice and video traffic, thus improving their performance across the network and addressing the users' complaints about call quality.
質問 # 54
Exhibit
policy-options { policy-statement Load-Balance-Policy { term Load-Balance { then { load-balance per-flow; accept;
}
}
}
}
routing-options {
router-id 192.168.100.11; autonomous-system 65201; forwarding-table {
export Load-Balance-Policy;
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The policy enables per-packet load balancing.
- B. The policy must be applied under the protocols hierarchy.
- C. The policy enables flow-based load balancing.
- D. The policy enables equal cost load balancing in the forwarding table.
正解：D
解説：
Theload-balance per-flowstatement in the Junos OS policy-options configuration enables flow-based load balancing in the forwarding table. This means that the traffic is distributed across multiple paths based on flows, where a flow is typically identified by attributes such as source and destination IP addresses, and possibly layer 4 information like TCP/UDP ports. This allows for more granular and efficient utilization of available paths, avoiding overloading a single path. The policy does not enable per-packet load balancing, which would send individual packets of the same flow over different paths, potentially causing out-of-order delivery issues. The policy's placement in theforwarding-tableexport suggests it's intended to influence forwarding behavior, not just routing protocol decisions, and does not necessarily have to be applied under the protocols hierarchy.
質問 # 55
Which two common routing policy actions affect the flow of policy evaluation? (Choose two.)
- A. next policy
- B. next term
- C. community
- D. next hop
正解：A、B
解説：
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.
質問 # 56
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.log file is deleted.
- B. The Junos device is rebooted.
- C. The factory default configuration is loaded.
- D. The interface changes you made are discarded.
正解：D
解説：
In Junos OS, issuing therollback 0command reverts the candidate configuration to the last committed configuration. If you have made changes to some interfaces but have not committed those changes, using rollback 0will discard these uncommitted changes, reverting to the state of the configuration at the time of the last commit. This command does not affect system files likemessages.log, reboot the device, or load the factory default configuration; it simply undoes uncommitted changes.
質問 # 57
Which Junos OS component is responsible for maintaining the forwarding table?
- A. Packet Forwarding Engine
- B. chassis control daemon
- C. Routing Engine
- D. management daemon
正解：A
解説：
The Packet Forwarding Engine (PFE) in Junos OS is responsible for maintaining the forwarding table. The PFE processes incoming packets, performs route lookups in the forwarding table, and forwards packets based on this information, offloading these tasks from the Routing Engine to ensure efficient packet forwarding.
質問 # 58
Which two statements about firewall filters are correct? (Choose two.)
- A. Firewall filters can match Layer 4 parameters.
- B. Firewall filters are stateless.
- C. Firewall filters can match Layer 7 parameters.
- D. Firewall filters are stateful.
正解：A、B
解説：
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.
質問 # 59
Which component is considered part of the data plane?
- A. the Packet Forwarding Engine
- B. the Routing Engine
- C. the fan tray
- D. the power supply
正解：A
解説：
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.
質問 # 60
After the factory default configuration is loaded, which configuration object must be created prior to the first commit?
- A. host name
- B. loopback IP address
- C. root authentication
- D. out-of-band connectivity
正解：C
解説：
In Juniper Networks devices, when the factory default configuration is loaded, the first step before committing any configuration is to set up root authentication. This is crucial because it secures the device by ensuring that only authorized users have administrative access. Without setting up a root password, the device will not allow any commit operations, which is a safety measure to prevent unauthorized access. This requirement emphasizes the importance Juniper places on security right from the initial setup of the device.
質問 # 61
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ベスト良質なJuniper JN0-105試験問題：https://drive.google.com/open?id=1xR-7Y4JvuONciG1O8AJ4wNEd0l_jBTc4