2025年最新の実際に出るJN0-683問題集テストエンジン試験問題はここにある
更新された公式資料はJN0-683認証済みのJN0-683問題集PDF
Juniper JN0-683 認定試験の出題範囲：
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質問 # 19
You are designing an IP fabric tor a large data center, and you are concerned about growth and scalability.
Which two actions would you take to address these concerns? (Choose two.)
- A. Design a three-stage Clos IP fabric.
- B. Use OFX5700 Series devices as the super spines.
- C. Design a five-stage Clos IP fabric.
- D. Use EX4300 Series devices as the spine devices.
正解：A、B
解説：
* Clos IP Fabric Design:
* A Clos fabric is a network topology designed for scalable, high-performance data centers. It is typically arranged in multiple stages, providing redundancy, high bandwidth, and low latency.
* Three-Stage Clos Fabric:
* Option B:A three-stage Clos fabric, consisting of leaf, spine, and super spine layers, is widely used in data centers. This design scales well and allows for easy expansion by adding more leaf and spine devices as needed.
* Super Spines for Scalability:
* Option D:Using high-capacity devices like the QFX5700 Series as super spines can handle the increased traffic demands in large data centers and support future growth. These devices provide the necessary bandwidth and scalability for large-scale deployments.
Conclusion:
* Option B:Correct-A three-stage Clos fabric is a proven design that addresses growth and scalability concerns in large data centers.
* Option D:Correct-QFX5700 Series devices are suitable for use as super spines in large-scale environments due to their high performance.
質問 # 20
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 server1 to server2 will transit a VXLAN tunnel to spinel or spine2. then a VXLAN tunnel from spinel or spine2 to Ieaf2.
- B. An IRB interface must be configured on spinel and spine2.
- C. Traffic from server! to server2 will transit the VXLAN tunnel between leaf1 and Ieaf2.
- D. An IRB Interface must be configured on leaf1 and Ieaf2.
正解：C、D
解説：
* Understanding the Exhibit Setup:
* The network diagram shows an EVPN-VXLAN setup, a common design for modern data centers enabling Layer 2 and Layer 3 services over an IP fabric.
* Leaf1 and Leaf2 are the leaf switches connected to Server1 and Server2, respectively, with each server in a different subnet (172.16.1.0/24 and 172.16.2.0/24).
* Spine1 and Spine2 are part of the IP fabric, interconnecting the leaf switches.
* EVPN-VXLAN Basics:
* EVPN (Ethernet VPN) provides Layer 2 and Layer 3 VPN services using MP-BGP.
* VXLAN (Virtual Extensible LAN) encapsulates Layer 2 frames into Layer 3 packets for transmission across an IP network.
* VTEP (VXLAN Tunnel Endpoint) interfaces on leaf devices handle VXLAN encapsulation and decapsulation.
* Integrated Routing and Bridging (IRB):
* IRB interfaces are required on leaf1 and leaf2 (where the endpoints are directly connected) to route between different subnets (in this case, between 172.16.1.0/24 and 172.16.2.0/24).
* The IRB interfaces provide the necessary L3 gateway functions for inter-subnet communication.
* Traffic Flow Analysis:
* Traffic from Server1 (172.16.1.1) destined for Server2 (172.16.2.1) must traverse from leaf1 to leaf2.
* The traffic will be VXLAN encapsulated on leaf1, sent over the IP fabric, and decapsulated on leaf2.
* Since the communication is between different subnets, the IRB interfaces on leaf1 and leaf2 are crucial for routing the traffic correctly.
* Correct Statements:
* C. An IRB Interface must be configured on leaf1 and leaf2:This is necessary to perform the inter-subnet routing for traffic between Server1 and Server2.
* D. Traffic from server1 to server2 will transit the VXLAN tunnel between leaf1 and leaf2:
This describes the correct VXLAN operation where the traffic is encapsulated by leaf1 and decapsulated by leaf2.
Data Center References:
* In EVPN-VXLAN architectures, the leaf switches often handle both Layer 2 switching and Layer 3 routing via IRB interfaces. This allows for efficient routing within the data center fabric without the need to involve the spine switches for every routing decision.
* The described traffic flow aligns with standard EVPN-VXLAN designs, where direct VXLAN tunnels between leaf switches enable seamless and scalable communication across a data center network.
質問 # 21
You are deploying multiple Juniper switches al the same location. Your switches are currently using the factory-default configuration.
In this scenario, which two statements are correct? (Choose two.)
- A. The switch will try to request an IP address from a DHCP server using only the management interface.
- B. The DHCP server configuration cannot provide Junos version requirements to DHCP clients.
- C. The DHCP server configuration can provide Junos version requirements to DHCP clients.
- D. The switch will try to request an IP address from a DHCP server using all interfaces that are connected and are operational.
正解：C、D
解説：
* DHCP Behavior in Factory-Default Configuration:
* Option B:In the factory-default configuration, Juniper switches are designed to send DHCP requests on all operational interfaces. This behavior ensures that the switch can obtain an IP address for management and further configuration from any available DHCP server.
* Option D:The DHCP server can provide additional configuration parameters, including the required Junos version. This allows for automated provisioning and ensures that the switch is running the correct software version.
Conclusion:
* Option B:Correct-The switch will use any operational interface to request an IP address via DHCP.
* Option D:Correct-The DHCP server can specify Junos version requirements, enabling automated software management.
質問 # 22
You are deploying an IP fabric using EBGP and notice that your leaf devices areadvertising and receiving all the routes. However, the routes are not installed in the routing table and are marked as hidden.
Which two statements describe how to solve the issue? (Choose two.)
- A. You need to configure a next-hop self policy.
- B. You need to configure loops 2.
- C. You need to configure multipath multiple-as.
- D. You need to configure as-override.
正解：A、C
質問 # 23
Which statement is correct about a collapsed fabric EVPN-VXLAN architecture?
- A. Using Virtual Chassis at the leaf layer increases resiliency.
- B. Fully meshed back-to-back links are needed between the spine devices.
- C. Border gateway functions occur on border leaf devices.
- D. It supports multiple vendors in the fabric as long as all the spine devices are Juniper devices deployed with L2 VTEPs
正解：C
解説：
* Collapsed Fabric Architecture:
* A collapsed fabric refers to a simplified architecture where the spine and leaf roles are combined, often reducing the number of devices and links required.
* In this architecture, the spine typically handles core switching, while leaf switches handle both access and distribution roles.
* Understanding Border Gateway Functionality:
* Border gateway functions include connecting the data center to external networks or other data centers.
* In a collapsed fabric, these functions are usually handled at the leaf level, particularly on border leaf devices that manage the ingress and egress of traffic to and from the data center fabric.
* Correct Statement:
* D. Border gateway functions occur on border leaf devices:This is accurate in collapsed fabric architectures, where the border leaf devices take on the role of managing external connections and handling routes to other data centers or the internet.
Data Center References:
* The collapsed fabric model is advantageous in smaller deployments or scenarios where simplicity and cost-effectiveness are prioritized. It reduces complexity by consolidating functions into fewer devices, and the border leaf handles the critical task of interfacing with external networks.
In conclusion, border gateway functions are effectively managed at the leaf layer in collapsed fabric architectures, ensuring that the data center can communicate with external networks seamlessly.
質問 # 24
Which two statements are true about EVPN routes for Data Center Interconnect? (Choose two.)
- A. Type 5 EVPN routes require a VXLAN tunnel to the protocol next hop.
- B. Type 5 EVPN routes do not require a VXLAN tunnel to the protocol next hop.
- C. Type 2 EVPN routes do not require a VXLAN tunnel to the protocol next hop.
- D. Type 2 EVPN routes require a VXLAN tunnel to the protocol next hop.
正解：B、C
解説：
* Type 2 EVPN Routes:
* Type 2 routesadvertise MAC addresses within an EVPN instance and are used primarily for Layer 2 bridging. These routes do not require a VXLAN tunnel to the protocol next hop because they operate within the same Layer 2 domain.
* Type 5 EVPN Routes:
* Type 5 routesare used to advertise IP prefixes (Layer 3 routes) within EVPN. Similar to Type 2 routes, they do not require a VXLAN tunnel to the protocol next hop because they represent L3 routes, which are managed at the routing layer without the need for VXLAN encapsulation.
Conclusion:
* Option B:Correct-Type 2 routes do not need a VXLAN tunnel to the next hop, as they are used for Layer 2.
* Option D:Correct-Type 5 routes also do not need a VXLAN tunnel because they operate at Layer 3, handling IP prefixes.
質問 # 25
You are asked to set up an IP fabric thatsupports Al or ML workloads. You have chosen to use lossless Ethernet in this scenario, which statement is correct about congestion management?
- A. ECN is negotiated only among the switches that make up the IP fabric for each queue.
- B. ECN marks packets based on WRED settings.
- C. The switch experiencing the congestion notifies the source device.
- D. Only the source and destination devices need ECN enabled.
正解：C
解説：
* Understanding Lossless Ethernet and Congestion Management:
* Lossless Ethernet is crucial for AI and ML workloads, where packet loss can significantly degrade performance. To implement lossless Ethernet, congestion management protocols like ECN (Explicit Congestion Notification) are used.
* Role of ECN in Congestion Management:
* Option A:In an IP fabric that supports lossless Ethernet, when a switch experiences congestion, it can mark packets using ECN. This marking notifies the source device of the congestion, allowing the source to reduce its transmission rate, thereby preventing packet loss.
Conclusion:
* Option A:Correct-The switch experiencing congestion notifies the source device via ECN marking.
質問 # 26
Exhibit.
The exhibit shows the truncated output of the show evpn database command.
Given this output, which two statements are correct about the host with MAC address 40:00:dc:01:00:04?
(Choose two.)
- A. The host is assigned IP address 10.4.4.5.
- B. The host is located on VN110002.
- C. The host is originating from an ESI LAG.
- D. The host is originating from irb.300.
正解：A、C
解説：
* Understanding the Output:
* The show evpn database command output shows the MAC address, VLAN, active source, timestamp, and IP address associated with various hosts in the EVPN instance.
* Analysis of the MAC Address:
* Option A:The MAC address 40:00:dc:01:00:04 is associated with the IP address 10.4.4.5, as indicated by the output in the IP address column. This confirms that this host has been assigned the IP 10.4.4.5.
* Option D:The active source for the MAC address 40:00:dc:01:00:04 is listed as 00:02:00:00:00:
04:00:04:00:00:04:00:04, which indicates that the host is connected via an ESI (Ethernet Segment Identifier) LAG (Link Aggregation Group). This setup is typicallyused in multi-homing scenarios to provide redundancy and load balancing across multiple physical links.
Conclusion:
* Option A:Correct-The host with MAC 40:00:dc:01:00:04 is assigned IP 10.4.4.5.
* Option D:Correct-The host is originating from an ESI LAG, as indicated by the active source value.
質問 # 27
You are asked to interconnect two of your company's data centers across an IP backbone. Both data centers require Layer 2 and Layer 3 connectivity. In this scenario, which three actions would accomplish this task?
(Choose three.)
- A. Advertise Type 2 EVPN routes across the DCI.
- B. Ensure there is a full mesh of VTEPs between all leaf nodes within data centers.
- C. Ensure border leaf nodes in each data center can exchange EVPN routes.
- D. Advertise Type 5 EVPN routes across the DCI.
- E. Ensure there is a full mesh of VTEPs between all spine nodes within both data centers.
正解：A、C、D
解説：
* Layer 2 and Layer 3 Connectivity Requirements:
* To interconnect two data centers across an IP backbone with both Layer 2 (L2) and Layer 3 (L3) connectivity, EVPN-VXLAN (Ethernet VPN with Virtual Extensible LAN) is the ideal solution.
EVPN supports L2 VPNs while also enabling L3 connectivity across multiple locations.
* Necessary EVPN Route Types:
* Type 2 EVPN Routes:These routes are used to advertise MAC addresses for Layer 2 connectivity. They are essential for enabling seamless L2 communication across data centers.
* Type 5 EVPN Routes:These routes are necessary for advertising IP prefixes for Layer 3 connectivity between data centers. They enable the exchange of L3 information across the IP backbone, ensuring routed traffic can reach its destination.
* Border Leaf Nodes:
* Border Leaf Nodes:Ensuring that the border leaf nodes (the entry and exit points for traffic between data centers) can exchange EVPN routes is critical for the correct dissemination of both L2 and L3 information across the data centers.
Conclusion:
* Option A:Correct-Type 2 EVPN routes are required for Layer 2 MAC address learning and communication across the DCI (Data Center Interconnect).
* Option B:Correct-Border leaf nodes need to exchange EVPN routes to maintain connectivity between data centers.
* Option D:Correct-Type 5 EVPN routes are essential for Layer 3 connectivity across the DCI.
OptionsCandEare incorrect because they refer to establishing full mesh VTEPs (VXLAN Tunnel Endpoints) across all spine or leaf nodes, which is unnecessary for the scenario provided. The focus should be on border leaf nodes and appropriate route advertisements for L2 and L3 connectivity.
質問 # 28
You are deploying an EVPN-VXLAN overlay. You must ensure that Layer 3 routing happens on the spine devices. In this scenario, which deployment architecture should you use?
- A. CRB
- B. distributed symmetric routing
- C. ERB
- D. bridged overlay
正解：A
解説：
* Understanding EVPN-VXLAN Architectures:
* EVPN-VXLAN overlays allow for scalable Layer 2 and Layer 3 services in modern data centers.
* CRB (Centralized Routing and Bridging):In this architecture, the Layer 3 routing is centralized on spine devices, while the leaf devices focus on Layer 2 switching and VXLAN tunneling. This setup is optimal when the goal is to centralize routing for ease of management and to avoid complex routing at the leaf level.
* ERB (Edge Routing and Bridging):This architecture places routing functions on the leaf devices, making it a distributed model where each leaf handles routing for its connected hosts.
* Architecture Choice for Spine Routing:
* Given the requirement to ensure Layer 3 routing happens on the spine devices, theCRB (Centralized Routing and Bridging)architecture is the correct choice. This configuration offloads routing tasks to the spine, centralizing control and potentially simplifying the overall design.
* Explanation:
* With CRB, the spine devices perform all routing between VXLAN segments. Leaf switches handle local switching and VXLAN encapsulation, but routing decisions are centralized at the spine level.
* This model is particularly advantageous in scenarios where centralized management and routing control are desired, reducing the complexity and configuration burden on the leaf switches.
Data Center References:
* The CRB architecture is commonly used in data centers where centralized control and simplified management are key design considerations. It allows the spines to act as the primary routing engines, ensuring that routing is handled in a consistent and scalable manner across the fabric.
質問 # 29
Why is a designated forwarder required in a multihomed CE-to-PE VXLAN environmentusing EVPN signalling?
- A. The designated forwarder is required to prevent a traffic storm from being received on multihomed hosts.
- B. The designated forwarder is required to prevent packets from looping between the PEs.
- C. The designated forwarder is required to prevent flooding of MAC addresses to multihomed hosts.
- D. The designated forwarder is required to prevent duplicate packets from being received on multihomed hosts.
正解：D
解説：
* Understanding Multihomed CE-to-PE VXLAN Environment:
* In a VXLAN environment using EVPN signaling, multiple PEs (Provider Edge devices) can be connected to the same CE (Customer Edge device). This setup is referred to as multihoming, where a CE device has multiple connections to the network to ensure redundancy and load balancing.
* Role of the Designated Forwarder:
* The designated forwarder (DF) is a mechanism used in EVPN to manage the forwarding of broadcast, unknown unicast, and multicast (BUM) traffic in a multihomed environment. The DF is selected to ensure that only one of the PEs forwards this type of traffic to the CE, preventing loops and unnecessary duplicate packets.
* Avoiding Duplicate Packets:
* Without a designated forwarder, all PEs connected to a multihomed CE could potentially forward the same packet to the CE, resulting in duplicate packets. This duplication can cause issues with packet processing on the CE, leading to inefficiencies and potential network problems.
Conclusion:
* Option D:Correct-The designated forwarder is essential to prevent duplicate packets from being received on multihomed hosts, ensuring that only one PE forwards BUM traffic to the CE.
質問 # 30
Which two statements are true about IP fabrics using unnumbered BGP? (Choose two.)
- A. Unnumbered BGP peering automatically provisions IPv6 peering.
- B. Unnumbered BGP requires that family inet6is configured on each interface.
- C. Unnumbered BGP peering automatically provisions IPv4 peering.
- D. Unnumbered BGP requires that family inet is configured on each interface.
正解：C、D
解説：
* Understanding Unnumbered BGP:
* Unnumbered BGP (Border Gateway Protocol) allows BGP peering between routers without assigning specific IP addresses to the interfaces. Instead, it uses the loopback address or another router identifier for the BGP session, making IP address management more straightforward in large-scale networks.
* Family inet Configuration:
* Option C:The family inet configuration is required on each interface involved in unnumbered BGP peering to support IPv4 address families. This ensures that IPv4 peering sessions can be established between devices.
* Automatic IPv4 Peering:
* Option D:Unnumbered BGP peering automatically provisions IPv4 peering sessions. This simplifies the configuration by eliminating the need to manually assign and manage IP addresses for BGP peering.
Conclusion:
* Option C:Correct-Unnumbered BGP requires the family inet configuration for IPv4.
* Option D:Correct-Unnumbered BGP automatically provisions IPv4 peering, simplifying setup.
質問 # 31
You are asked to configure telemetry on the OFX Series devices in your data center fabric. You want to use sensors that have a vendor-neutral data model Which type of sensor should you use in this scenario?
- A. analog sensors
- B. JTI OpenConfig sensors
- C. Python sensors
- D. JTI native sensors
正解：B
解説：
* Telemetry in Data Centers:
* Telemetry allows for real-time monitoring of network devices by collecting and exporting data such as interface statistics, routing table updates, and other key metrics.
* Vendor-Neutral Data Models:
* Option A:JTI (Junos Telemetry Interface) OpenConfig sensors use a vendor-neutral data model, which is important for ensuring compatibility across different network devices and systems.
OpenConfig is an industry-standard model, which facilitates integration with various telemetry collection systems.
Conclusion:
* Option A:Correct-OpenConfig sensors provide a vendor-neutral solution for telemetry, ensuring broad compatibility and flexibility in data center environments.
質問 # 32
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 IP address of the FTP server
- B. the management IP address for each OFX5120
- C. the MAC address of the FTP server
- D. the MAC address for each OFX5120
正解：B、D
解説：
* Zero Touch Provisioning (ZTP):
* ZTP allows for the automated configuration of network devices, like QFX Series switches, without manual intervention. During ZTP, a switch will obtain its configuration from a DHCP server and then download the required software and configuration files from a specified server (e.
g., FTP, HTTP).
* DHCP Server Configuration:
* Option B:The DHCP server needs to know theMAC address for each QFX5120to provide a specific configuration based on the device identity. By mapping the MAC address to a particular configuration, the DHCP server can ensure that each switch gets the correct configuration.
* Option D:Themanagement IP address for each QFX5120must also be assigned by the DHCP server. This IP address allows the device to communicate on the network and access the configuration files and other required resources during the ZTP process.
Conclusion:
* Option B:Correct-MAC addresses allow the DHCP server to identify each QFX5120 and assign the appropriate configuration.
* Option D:Correct-Management IP addresses are essential for network communication during ZTP.
質問 # 33
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. JScript. and Ansible.
- C. The Junos ZTP process supports Python, SLAX, and Perl.
- D. The Junos ZTP process supports Shell. Python, and SLAX.
正解：D
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 # 34
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 an NTP server to perform time synchronization.
- B. You must have a DHCP server that provides the location of the 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 a file server that stores software image and configuration files.
正解：B、D
解説：
* Zero-Touch Provisioning (ZTP):
* ZTP is a feature that allows for the automatic provisioning of devices with minimal manual intervention. It is widely used in large-scale deployments to quickly bring new devices online.
* Key Requirements for ZTP:
* A. DHCP Server:A DHCP server is crucial for ZTP as it provides the necessary information to new devices, such as the IP address, the location of the software image, and configuration files.
* D. File Server:The file server is where the software image and configuration files are stored. The device downloads these files during the provisioning process.
* Incorrect Options:
* B. Syslog Server:While a syslog server is important for logging and monitoring, it is not a requirement for the initial provisioning process.
* C. NTP Server:An NTP server is used for time synchronization, which is essential for accurate logging and operation but not specifically required for ZTP.
Data Center References:
* ZTP simplifies the deployment process by automating the initial configuration steps, relying heavily on DHCP for communication and a file server for delivering the necessary configuration and software.
質問 # 35
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：
* Understanding VRF and Routing Instances:
* In an EVPN-VXLAN overlay network, multiple tenants are separated using unique VRF (Virtual Routing and Forwarding) instances. Each VRF instance maintains its own routing table, allowing for isolated routing domains within the same network infrastructure.
* Role of Route Distinguisher:
* Route Distinguisher (RD):The RD is a unique identifier used in MPLS and EVPN environments to distinguish routes belonging to different VRFs. The RD is prepended to the IP address in the route advertisement, ensuring that routes from different tenants remain unique even if they use the same IP address range.
* Correct Property:
* D. the route distinguisher value:This is the correct answer because the RD is crucial in determining which routing information belongs to which VRF instance. It ensures that each VRF' s routing table only contains relevant routes, maintaining isolation between tenants.
Data Center References:
* The RD is a key element in MPLS and EVPN-based multi-tenant environments, ensuring proper routing segregation and isolation for different VRFs within the data center fabric.
質問 # 36
You are asked to interconnect two of your company's data centers across the IP backbone. Both data centers have their own unique IP space and do not require any bridging. In this scenario, which two actions would accomplish this task? (Choose two.)
- A. Configure a Type 2 EVPN route for each unique prefix.
- B. Configure peering for EVPN between all leaf nodes within each data center.
- C. Configure peering for EVPN between border leaf nodes in each data center.
- D. Configure a Type 5 EVPN route for each unique prefix.
正解：C、D
解説：
* Interconnecting Data Centers:
* The scenario requires interconnecting two data centers with unique IP spaces across an IP backbone. The key point is that bridging is not required, so Layer 3 routing methods must be used.
* EVPN Configuration:
* Option B:Establishing EVPN peering between the border leaf nodes in each data center is the most appropriate solution as it allows for exchanging routing information between the two data centers. This ensures that the routes are properly distributed without the need for L2 bridging.
* Option C:Configuring Type 5 EVPN routes is necessary for advertising IP prefixes (Layer 3 routes) across the EVPN. Type 5 routes allow for the exchange of IP prefixes between the two data centers, enabling the necessary routing functionality without the need for bridging.
Conclusion:
* Option B:Correct-Peering between border leaf nodes sets up the necessary route exchange between data centers.
* Option C:Correct-Type 5 EVPN routes are essential for exchanging Layer 3 prefixes between data centers.
質問 # 37
Which three statements are correct about VXLAN control planes? (Choose three.)
- A. EVPN is inefficient and does not scale well.
- B. Multicast does not require as many resources.
- C. Both multicast and EVPN can facilitate MAC learning.
- D. Multicast is not agile and requires manual VNI mapping.
- E. EVPN enables fast convergence and updates.
正解：B、C、E
解説：
* VXLAN Control Planes:
* VXLAN (Virtual Extensible LAN) uses different control planes to handle MAC learning and traffic forwarding. The control planes include multicast and EVPN (Ethernet VPN).
* Multicast and EVPN Comparison:
* Option B:Both multicast and EVPN can be used for MAC learning in a VXLAN environment.
Multicast is a more traditional approach, while EVPN is more advanced and supports distributed MAC learning.
* Option D:EVPN offers benefits such as fast convergence and rapid updates, making it more efficient and scalable for modern data center environments.
* Option E:Multicast does not require as many resources because it relies on traditional Layer 3 multicast mechanisms to distribute broadcast, unknown unicast, and multicast (BUM) traffic.
However, it can be less flexible and less scalable compared to EVPN.
Conclusion:
* Option B:Correct-Both control planes facilitate MAC learning.
* Option D:Correct-EVPN provides fast convergence and updates.
* Option E:Correct-Multicast is resource-efficient but less flexible.
質問 # 38
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