[2024年12月15日] 合格JNCIA JN0-105試験問題集には101問があります
究極ガイドの無料準備Juniper JN0-105試験問題と解答
質問 # 52
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?
- A. Files are storedto the SCP site and the FTP site simultaneously.
- B. Files are storedto the SCP site and the FTP site in a round-robinmanner.
- C. Files are storedto any site as selected by Junos internally.
- D. Files are storedto the SCP site but if the transfer fails, then to theFTP site.
正解：A
解説：
In Junos OS, thearchivalconfiguration under[edit system]allows for the automatic backup of configuration files to designated locations upon commit. When multiplearchive-sitesare 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.
質問 # 53
Which two common routing policy actions affect the flow of policy evaluation? (Choose two.)
- A. next hop
- B. community
- C. next term
- D. next policy
正解：C、D
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 # 54
A network administrator is attempting to route traffic on a Juniper switch to one of three different VLANs:
Prod, Test, and Dev. Each VLAN has been assigned a numerical value.
In this scenario, what are these numerical values called?
- A. tags
- B. defaults
- C. names
- D. interfaces
正解：A
解説：
In the context of VLANs (Virtual Local Area Networks) on a Juniper switch, the numerical values assigned to each VLAN, such as those for Prod, Test, and Dev, are known as VLAN tags. These tags are part of the
802.1Q VLAN standard, which allows multiple VLANs to coexist on a single physical network. Each tag uniquely identifies the VLAN to which a frame belongs, enabling the switch to segregate and manage traffic based on VLAN membership. This tagging mechanism allows for efficient traffic separation and management, ensuring that devices within one VLAN do not receive traffic intended for another, thus maintaining network security and efficiency.
質問 # 55
What are two advantages of using the Junos OS? (Choose two.)
- A. It supports up to a maximum of two previous configurations.
- B. It pushes your configuration changes "live" immediately.
- C. It enables you to roll back to a previous configuration.
- D. It is modular.
正解：C、D
解説：
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.
質問 # 56
Which two common routing policy actions affect the flow of policy evaluation? (Choose two.)
- A. next hop
- B. community
- C. next term
- D. next policy
正解：C、D
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 # 57
Exhibit.
Referring to the exhibit, which routing configuration is required for these two users to access the remote server?
- A. Users must connect directly to the router.
- B. Users and the server require a default gateway.
- C. A routing protocol must be enabled on the router.
- D. Trunk ports must be enabled on the switch.
正解：B
解説：
In a typical network configuration, users and servers require a default gateway to communicate with devices on different networks or subnets. The default gateway is usually the router's interface on the same network, which routes the traffic to other networks. This is essential for the two users to access the remote server if the server is on a different subnet, which is indicated by the different network addresses.
質問 # 58
You want to find out the chassis serial number of a Junos device.
Which command would display this information?
- A. show chassis environment
- B. show chassis location
- C. show chassis hardware
- D. show chassis routing-engine
正解：C
解説：
Theshow chassis hardwarecommand in Junos OS displays detailed information about the hardware installed in the device, including the chassis itself. This command provides a list of all hardware components, their serial numbers, part numbers, and version information. When looking for the chassis serial number specifically, this command is the most direct and comprehensive way to retrieve that information, as it includes the serial number of the chassis among the details provided.
質問 # 59
You issue the telnet 10.10.10.1 source 192.168.100.1 command.
Which two statements are correct in this scenario? (Choose two.)
- A. The telnet session will have a source address of 10.10.10.1.
- B. The telnet session will have a destination address of 10.10.10.1.
- C. The telnet session will have a source address of 192.168.100.1.
- D. The telnet session will have a destination address of 192.168.100.1.
正解：B、C
解説：
In the given telnet command, "telnet 10.10.10.1 source 192.168.100.1," the destination address of the telnet session is 10.10.10.1, and the source address of the session is specified as 192.168.100.1, making C and D the correct answers. This command instructs the telnet client to use the specified source IP address when establishing the connection to the destination.
質問 # 60
Which character is used to filter the command output in the Junos CLI?
- A. <
- B. >
- C. |
- D. ?
正解：C
解説：
In the Junos CLI, the pipe character | is used as a filter operator to refine command output. This operator can be combined with various filtering commands like match, except, count, etc., to display only the relevant portions of the command output. For example, using | match <pattern> filters the output to show only the lines that contain the specified pattern, making it easier to find specific information within extensive command output. This functionality is especially useful in managing and troubleshooting complex configurations and network states, allowing for more efficient analysis of the device's operational status and configuration details.
質問 # 61
Which two statements are true about the PFE? (Choose two.)
- A. The PFE implements various services such as policing, stateless firewall filtering, and class of service.
- B. The PFE is responsible for performing protocol updates and system management.
- C. The PFE handles all processes that control the chassis components.
- D. The PFE uses Layer 2 and Layer 3 forwarding tables to forward traffic toward its destination.
正解：A、D
解説：
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.
質問 # 62
You have completed the initial configuration of your new Junos device. You want to be able to load this configuration at a later time.
Which action enables you to perform this task?
- A. Enter the request system configuration rescue save command.
- B. Enter the request system reboot command.
- C. Enter the load factory-default command.
- D. Enter the request system zeroize command.
正解：A
解説：
In Junos OS, the request system configuration rescue save command is used to save the current active configuration as a rescue configuration. This feature is particularly useful for preserving a known good configuration state that can be quickly reverted to in case of configuration errors or issues. By saving a rescue configuration, administrators can ensure that they have a reliable fallback option that can be loaded in the future to restore the device's operation without having to reconfigure from scratch. This is an essential practice for maintaining network stability and quick recovery.
質問 # 63
Which two actions happen when multiple users issue the configure exclusive command to enter configuration mode on a Junos device? (Choose two.)
- A. Other users can enter configuration mode.
- B. The candidate configuration is unlocked.
- C. The candidate configuration is locked.
- D. Other users cannot enter configuration mode.
正解：D
解説：
When a user enters configuration mode using theconfigure exclusivecommand on a Junos device, the candidate configuration is locked for that user, preventing other users from making concurrent configuration changes. This exclusive lock ensures that only one user can make changes at a time, preventing conflicts and potential errors from simultaneous modifications. Other users attempting to enter configuration mode while it is locked will receive a notification that the configuration is currently being edited by another user.
質問 # 64
Which two statements are true about the Junos OS? (Choose two.)
- A. Exception traffic is sent to the control plane.
- B. Exception traffic is never sent to the control plane.
- C. Routing tables are stored in the forwarding plane.
- D. Routing tables are stored in the control plane.
正解：A、D
解説：
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.
質問 # 65
What are two methods for navigating to configuration mode from an operational mode prompt? (Choose two.)
- A. Use the quit command.
- B. Use the exit command.
- C. Use the edit command.
- D. Use the configure command.
正解：C、D
解説：
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.
質問 # 66
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. next hop MAC address
- B. OSPF metric value
- C. BGP local preference value
- D. next hop IP address
- E. outgoing interface name
正解：A、D、E
解説：
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.
質問 # 67
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. next hop MAC address
- B. OSPF metric value
- C. BGP local preference value
- D. next hop IP address
- E. outgoing interface name
正解：A、D、E
解説：
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.
質問 # 68
You are trying to diagnose packet loss at interface ge-0/0/3.
In this scenario, which command would help you view error statistics in real time?
- A. monitor interface traffic
- B. monitor interface ge-0/0/3
- C. show interface terse
- D. show interface ge-0/0/3
正解：B
解説：
Themonitor interface ge-0/0/3command is used in Junos OS to view real-time statistics for a specific interface. This command helps in diagnosing issues like packet loss by displaying real-time updates of traffic and error statistics for the specified interface.
質問 # 69
Which command displays all IPv6 routes in the default routing instance?
- A. showroute table inet.0
- B. showroute table inet.l
- C. showroute table inet6.0
- D. showroute table inet6.1
正解：C
解説：
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.
質問 # 70
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Junos, Associate (JNCIA-Junos)練習テスト2024年最新のストレスなしでJN0-105合格！：https://drive.google.com/open?id=1PFdMbtn9tdT3RZq2_LGHLpDjdXxLJZh9
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