[2026年09月06日]JN0-683試験問題集でリアル試験と100%同じ問題と解答
JN0-683テストエンジン問題集トレーニングには117問あります
Juniper JN0-683 認定試験の出題範囲：
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質問 # 16
In a centrally-routed bridging (CRB) overlay, which device typically performs the Layer 3 gateway function?
- A. The spine devices.
- B. The access switches.
- C. The border leaf devices only.
- D. The server leaf devices.
正解：A
解説：
In a centrally-routed bridging (CRB) architecture, the IRB interfaces and Layer 3 gateway functionality reside on the spine devices, while the leaf devices operate purely at Layer 2 performing VXLAN bridging. This centralizes routing decisions but can introduce additional hops for inter-VLAN traffic compared to an edge-routed bridging design.
質問 # 17
You are asked to automatically provision new Juniper Networks devices in your network with minimal manual intervention Before you begin, which two statements are correct? (Choose two.)
- A. You must have a DHCP server that provides the location of the software image and configuration files.
- B. You must have a file server that stores software image and configuration files.
- C. You must have a system log (syslog) server to manage system log messages and alerts.
- D. You must have an NTP server to perform time synchronization.
正解：A、B
解説：
You must have a DHCP server that provides the location of the software image and configuration files: This is necessary because DHCP is typically used in automated provisioning processes to provide the device with its IP address, gateway, and important information like the location of the configuration and software image files. These files are crucial for the device to properly boot and configure itself.
You must have a file server that stores software image and configuration files: A file server (usually TFTP or HTTP server) is required to store the necessary software image and configuration files for the Juniper device. These files are fetched during the provisioning process to set up the device.
質問 # 18
You need to deploy a new data center. As part of the switch onboarding process, you want to use Juniper Networks' zero-touch provisioning (ZTP) process. Which statement is correct about this scenario?
- A. The minimum requirement is a DHCP IP address for the ZTP process to terminate.
- B. Scripts that require execution must end with .sh or .py.
- C. Junos images on the devices can be upgraded, but not downgraded.
- D. The switch's default hostname is the switch's MAC address.
正解：B
解説：
In the Junos ZTP process, any script provided for automatic execution must use a supported format, specifically shell (.sh) or Python (.py). These script types are recognized and executed by the device during the provisioning workflow.
質問 # 19
You are asked to build redundant gateways in your EVPN-VXLAN environment, but you must conserve address space because these gateways must span across seven PES. What should you implement on the PEs lo satisfy these requirements?
- A. Use IRB interfaces with different IP addresses and the same VGA.
- B. Use IRB interfaces with the same IP address and different MAC addresses.
- C. Use IRB interfaces with the same IP and MAC address.
- D. Use IRB interfaces with the same IP and VGA.
正解：C
解説：
* Redundant Gateways in EVPN-VXLAN:
* In an EVPN-VXLAN environment, providing redundant gateway functionality typically involves the use of Anycast Gateway. This allows multiple PEs (Provider Edge devices) to use the same IP address and MAC address for the gateway, enabling seamless failover and redundancy without IP conflicts.
* Conserving Address Space:
* Using the same IP address across multiple PEs conserves address space because only one IP address is needed for the gateway function, regardless of the number of PEs. The shared MAC address ensures that ARP resolution and forwarding behavior are consistent across all the PEs.
Conclusion:
* Option C:Correct-Using IRB interfaces with the same IP and MAC address across all PEs satisfies the need for redundancy while conserving address space.
OptionsA, B,andDintroduce unnecessary complexity or do not fully utilize the efficient Anycast Gateway approach, which is best practice for conserving IP space and providing redundancy.
質問 # 20
You are asked to interconnect Iwo data centers using a method that provides EVPN Type 2 connectivity, is highly scalable, and limits VXLAN tunnels between border leafdevices. What will satisfy these requirements?
- A. IP VPN
- B. over the top full-mesh interconnect
- C. Type 2 seamless stitching
- D. EVPN Type 2 stretch
正解：C
解説：
* Requirement Analysis:
* The scenario requires a solution to interconnect two data centers that supports EVPN Type 2 connectivity. The solution must be highly scalable and must minimize the number of VXLAN tunnels between border leaf devices.
* Understanding Type 2 Seamless Stitching:
* Option D:Type 2 seamless stitchingis a method used in EVPN to provide Layer 2 connectivity (such as MAC address mobility) across different VXLAN segments. It is scalable because it allows only necessary tunnels to be established between border leaf devices, reducing the overhead of maintaining a full mesh of VXLAN tunnels.
Conclusion:
* Option D:Correct-Type 2 seamless stitching satisfies the requirement by enabling scalable, efficient interconnection of two data centers with minimal VXLAN tunnels.
質問 # 21
You manage an IP fabric with an EVPN-VXLAN overlay. You have multiple tenants separated using multiple unique VRF instances. You want to determine the routing information that belongs in each routing instance's routing table.
In this scenario, which property is used for this purpose?
- A. the VRF target community
- B. the routing instance type
- C. the VRF table label
- D. the route distinguisher value
正解：D
解説：
In an EVPN-VXLAN overlay, the route distinguisher (RD) is used to uniquely identify routes in different VRFs (Virtual Routing and Forwarding instances). The RD allows the same IP address to be used in different VRFs, making sure the routing information for each tenant is separated.
The RD value ensures that each routing instance (or VRF) has its own unique address space and routing table entries.
質問 # 22
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. Each leaf device replaces the source MAC address of the original frame with the MAC address of the gateway interface.
- B. Each leaf device acts as a bridge between the VNIs and allows traffic from one VNI to be forwarded to a different VNI.
- C. Each leaf device encapsulates Layer 2 frames in VXLAN packets and performs Layer 3 forwarding on the Layer 3 IP fabric.
- D. Each leaf device removes the VXLAN header and forwards the Layer 2 frame with original source and destination MAC address.
正解：C、D
解説：
The leaf switches function as VTEPs: they encapsulate customer Layer 2 frames into VXLAN over the routed IP underlay, which then forwards the packets based on the outer IP header.
When the VXLAN packet reaches the destination leaf, that leaf decapsulates the VXLAN header and forwards the original Layer 2 frame toward the attached server, preserving the original source and destination MAC addresses.
質問 # 23
Exhibit.
Host A is connected to vlan 100 on lead. Host B is connected to vlan 200 on leaf1. Host A and Host B ate unable to communicate. You have reviewed the touting and your hosts have the correct default route (.1) Referring to the exhibit, which two commands will solve the problem? (Choose two.)
- A. set interfaces irb unit 100 family inet address 192-168.100.1
- B. delete vlans vn200 13-interface irb.200
- C. set vlans vn10013-interface irb.100
- D. set routing-options static route 0.0.0.0/0 next-hop 192.168.200.10
正解：C、D
解説：
In the provided network configuration, Host A is in VLAN 100 and Host B is in VLAN 200. The issue arises because these two hosts are unable to communicate, which indicates that either the interfaces are not properly linked to their respective VLANs, or there is a missing static route required for inter-VLAN routing.
Step-by-Step Analysis:
* VLAN Assignment:
* The exhibit shows that irb.200 is correctly associated with VLAN 200 in the configuration.
However, there is no corresponding irb.100 for VLAN 100. Without irb.100, the network lacks the logical interface to handle routing for VLAN 100. Thus, adding irb.100 to VLAN 100 is necessary.
Command to solve this:
set vlans vn100 13-interface irb.100
* Static Route Configuration:
* For inter-VLAN routing to occur, a static route needs to be configured that allows traffic to pass between different subnets (in this case, between VLAN 100 and VLAN 200). The command set routing-options static route 0.0.0.0/0 next-hop 192.168.200.10 would add a static route that directs all traffic from VLAN 100 to the correct gateway (192.168.200.10), which is necessary to route traffic between the two VLANs.
Command to solve this:
set routing-options static route 0.0.0.0/0 next-hop 192.168.200.10
Explanation of Incorrect Options:
* Option A (delete vlans vn200 13-interface irb.200): This would remove the logical interface associated with VLAN 200, which is not desired because we need VLAN 200 to remain active and properly routed.
* Option B (set interfaces irb unit 100 family inet address 192-168.100.1): This command would incorrectly assign an IP address that does not correspond with the subnet of VLAN 100 (192.168.200.1
/24). This could create a misconfiguration, leading to routing issues.
Data Center References:
For a Data Center, proper VLAN management and static routing are crucial for ensuring that different network segments can communicate effectively, especially when dealing with separated subnets or zones like in different VLANs. This aligns with best practices in DCIM (Data Center InfrastructureManagement) which stress the importance of proper network configuration to avoid downtime and ensure seamless communication between all critical IT infrastructure components.
Ensuring that the correct interfaces are associated with the correct VLANs and having the proper static routes in place are both essential steps in maintaining a robust and reliable data center network.
This detailed analysis reflects best practices as noted in standard data center design and network configuration guides.
質問 # 24
Which protocol permits the highest level of scalability for an IP underlay fabric?
- A. EBGP
- B. RIP
- C. VXLAN
- D. RSVP
正解：A
解説：
EBGP provides high scalability in IP underlay fabrics by supporting large-scale route distribution with strong policy control and loop prevention through AS path mechanisms. It enables scalable ECMP, efficient route advertisement, and operational isolation between nodes, making it well suited for large data center spine-leaf architectures.
質問 # 25
In your EVPN-VXAN environment, you want to prevent a multihomed server from receiving multiple copies ofBUM traffic in active/active scenarios. Which EVPN route type would satisfy this requirement?
- A. Type 5
- B. Type 7
- C. Type 8
- D. Type 4
正解：D
解説：
* Understanding the Scenario:
* In an EVPN-VXLAN environment, when using multi-homing in active/active scenarios, there's a risk that a multihomed server might receive duplicate copies of Broadcast, Unknown unicast, and Multicast (BUM) traffic. This is because multiple VTEPs might forward the same BUM traffic to the server.
* EVPN Route Types:
* Type 4 Route (Ethernet Segment Route):This route type is used to advertise the Ethernet Segment (ES) to which the device is connected. It is specifically used in multi-homing scenarios to signal the ES and its associated Ethernet Tag to all the remote VTEPs. The Type 4 route includes information that helps prevent BUM traffic duplication in active/active multi-homing by using a split-horizon mechanism, which ensures that traffic sent to a multihomed device does not get looped back.
* Explanation:
* The Type 4 route is crucial for ensuring that in a multi-homed setup, particularly in an active
/active configuration, BUM traffic does not result in duplication at the server. The route helps coordinate which VTEP is responsible for forwarding the BUM traffic to the server, thereby preventing duplicate traffic.
Data Center References:
* Type 4 routes are essential for managing multi-homing in EVPN to avoid the issues of BUM traffic duplication, which could otherwise lead to inefficiencies and potential network issues.
質問 # 26
As part of the onboarding process for new switches being added to your data centers, your company uses Juniper Networks' ZTP process. As part of the ZTP process, a script is executed by the devices being onboarded.
Which statement is correct in this scenario?
- A. The Junos ZTP process supports JScript. Ansible. and Perl.
- B. The Junos ZTP process supports Shell. Python, and SLAX.
- C. The Junos ZTP process supports Python, SLAX, and Perl.
- D. The Junos ZTP process supports Shell. JScript. and Ansible.
正解：B
解説：
* Zero Touch Provisioning (ZTP):
* Juniper Networks' ZTP (Zero Touch Provisioning) process automates the deployment of new devices by allowing them to fetch and execute scripts for configuration and setup as they are powered on and connected to the network.
* Supported Scripting Languages:
* The Junos OS supports several scripting languages that can be used during the ZTP process:
* Shellscripts are often used for general automation tasks.
* Pythonis a widely supported language in Junos, offering powerful scripting capabilities for automating network tasks.
* SLAX(Service Logic Execution Environment) is a scripting language specific to Junos, designed to automate configuration tasks and simplify network operations.
Conclusion:
* Option D:Correct-Junos ZTP supports Shell, Python, and SLAX, making it the correct choice among the provided options.
質問 # 27
Referring to the exhibit, when Host A sends an ARP request for Host B's IP address, which Junos feature does leaf1 require to send an ARP response back to Host A without having to send a broadcast frame over the fabric?
- A. proxy ARP
- B. GARP
- C. proxy NDP
- D. DAD
正解：A
解説：
proxy ARP: In this scenario, when Host A sends an ARP request for Host B's IP address, leaf1 can use proxy ARP to respond to the ARP request without needing to forward it as a broadcast over the fabric. Proxy ARP allows leaf1 to reply with Host B's MAC address even though Host A and Host B are not directly connected on the same network segment. The leaf switch acts as the proxy for the destination IP.
質問 # 28
Exhibit.
You have implemented an EVPN-VXLAN data center. Device served must be able to communicate with device server2.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. Traffic from server! to server2 will transit the VXLAN tunnel between leaf1 and Ieaf2.
- B. An IRB interface must be configured on spine1and spine2.
- C. An IRB Interface must be configured on leaf1 and Ieaf2.
- D. Traffic from server1 to server2 will transit a VXLAN tunnel to spinel or spine2. then a VXLAN tunnel from spinel or spine2 to Ieaf2.
正解：B、D
質問 # 29
You need to load-balance traffic across multiple links to a multihomed CE device using ESI-LAG in all-active mode. Which protocol is used between the CE and the leaf devices to achieve this?
- A. STP
- B. VRRP
- C. GRE
- D. LACP
正解：D
解説：
When a CE device is multihomed to multiple leaf devices in all-active mode using ESI-LAG, the Link Aggregation Control Protocol (LACP) is used between the CE and each leaf device to bundle the physical links into a logical aggregated Ethernet interface. This allows traffic to be load- balanced across all active links while the leaf devices coordinate over EVPN to present a consistent forwarding view to the CE.
質問 # 30
You are asked to deploy 100 QFX Series devices using ZTP Each OFX5120 requires a different configuration. In this scenario, what are two components that you would configure on the DHCP server?
(Choose two.)
- A. the management IP address for each OFX5120
- B. the MAC address for each OFX5120
- C. the MAC address of the FTP server
- D. the IP address of the FTP server
正解：A、B
質問 # 31
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JN0-683練習テストPDF試験材料：https://www.jpntest.com/shiken/JN0-683-mondaishu
JN0-683問題で一発合格させる問題集にはJNCIP-DC認定問題を使おう：https://drive.google.com/open?id=1LEkhPNKsc0Lc3LqUua5onUT_MKpQ9HQz