[2024年更新]D-SNC-DY-00リアルな試験問題集でD-SNC-DY-00練習テスト
D-SNC-DY-00問題集でDell Networking高確率練習問題集
質問 # 24
What is ECMP?
- A. A Layer 3 routing feature to forward traffic using multiple available paths
- B. A routing protocol database filter supporting a maximum of four paths
- C. A round-robin path distribution mechanism
- D. A routing protocol with multipath support
正解：A
解説：
ECMP (Equal-Cost Multi-Path) is a Layer 3 routing feature that allows traffic to be forwarded using multiple available paths of equal cost. This improves bandwidth utilization and provides redundancy. ECMP is commonly used in modern networks to optimize the flow of traffic and increase the resiliency of network connections.
References:
* Dell Technologies SONiC documentation
* ECMP Configuration Guide
質問 # 25
What is the correct order of steps for data flow in asymmetric IRB frame encapsulation?
正解：
解説：
Explanation:
* Ingress VTEP performs a route lookup that is based on the destination IP address.
* Ingress VTEP encapsulates the packet with VXLAN and sends it on the appropriate VNI segment.
* Egress VTEP determines that the host is local to the VNI and switches the packet.
* Egress VTEP bridges the packet after decapsulation.
Steps and Correct Order:
* Ingress VTEP performs a route lookup that is based on the destination IP address.
* The ingress VTEP (Virtual Tunnel Endpoint) first needs to determine the next hop for the packet.
This involves performing a route lookup using the destination IP address.
* Ingress VTEP encapsulates the packet with VXLAN and sends it on the appropriate VNI segment.
* Once the route lookup is complete, the ingress VTEP encapsulates the packet in a VXLAN header, which includes the appropriate VNI (VXLAN Network Identifier) segment, and forwards it.
* Egress VTEP determines that the host is local to the VNI and switches the packet.
* The egress VTEP receives the encapsulated VXLAN packet, decapsulates it, and then checks its local VNI to determine if the destination host is within the same VNI.
* Egress VTEP bridges the packet after decapsulation.
* After determining the destination host's locality, the egress VTEP bridges the packet to the appropriate interface to deliver it to the final destination.
References:
* Dell Technologies Networking - SONiC
* Dell Enterprise SONiC Deployment Guide
These steps provide a comprehensive guide to understand the correct order of operations in asymmetric IRB (Integrated Routing and Bridging) frame encapsulation within a VXLAN environment.
質問 # 26
In what order should these commands be entered to configure an access port in SONiC CLI if the required VLAN is already configured?
正解：
解説：
Explanation:
To configure an access port on the SONiC CLI, the commands should be entered in the following order:
* Enter global configuration mode with configure terminal.
* Specify the interface to configure using interface ethernet 1/1.
* Set the interface to access mode and assign it to VLAN 20 with switchport access vlan 20.
* Exit the interface configuration mode with exit.
References:
* Dell Technologies SONiC Command Reference Guide
* Dell Networking Configuration Guide
質問 # 27
Which two elements must be included in the show mclag interface x x command?
- A. Peer-link port channel number
- B. MC-LAG port channel number
- C. MC-LAG domain id
- D. MC-LAG VLAN id
正解：A、B
解説：
The show mclag interface command provides information about the multi-chassis link aggregation (MC-LAG) configuration. Essential elements that must be included are the peer-link port channel number and the MC-LAG port channel number. These parameters are critical for identifying the interface and its associated link aggregation settings.
References:
* Dell SONiC Command Reference Guide
* Dell Technologies InfoHub
Topic 1, SIMULATION / Lab based
質問 # 28
Which network devices route unencapsulated user traffic in a symmetric IRB overlay network?
- A. Capability extended next hop router and leaf router
- B. Leaf router and spine router
- C. Autonomous system boundary router and source VTEP
- D. Source VTEP and destination VTEP
正解：D
解説：
In a symmetric Integrated Routing and Bridging (IRB) overlay network, the Source Virtual Tunnel End Point (VTEP) and the Destination VTEP route unencapsulated user traffic. Symmetric IRB ensures that routing occurs at both the ingress and egress VTEPs, allowing for optimized traffic flow and efficient network operations.
References:
* Dell Technologies SONiC documentation
* VXLAN Configuration Guide
質問 # 29
What interface must be selected when configuring the management port from within the MF-CLI environment?
- A. ma 0/1
- B. Management 0
- C. eth0
- D. mgmt 1/1/1
正解：C
解説：
* Dell SONiC Management Interface Configuration:
* In Dell SONiC, the management port configuration is a crucial aspect that allows administrators to access and manage the network device.
* The management interface typically provides out-of-band management access to the device, ensuring that even if the data network is down, the management network can still be accessed.
* Common Interface Naming Conventions:
* mgmt 1/1/1: This naming convention is not typically used in Dell SONiC environments for management interfaces.
* ma 0/1: This could be a potential naming convention but is not standard for Dell SONiC.
* Management 0: This is a logical name but does not align with the standard interface naming conventions used in Dell SONiC.
* eth0: This is the standard naming convention used for the primary management interface in most Linux-based systems, including Dell SONiC.
* Verification with Dell SONiC Documentation:
* Dell SONiC documentation specifies that the management interface is usually named eth0.
* When accessing the management interface within the MF-CLI (Management Framework Command Line Interface) environment, eth0 is the correct interface to configure.
* Practical Configuration Example:
* When configuring the management port, the command might look something like:
config interface ip add eth0 <management_ip_address>/<subnet_mask>
* This command specifies the management interface eth0 and assigns it an IP address for network management purposes.
References:
* Dell Enterprise SONiC Deployment Guide
* Dell Technologies Networking - SONiC
This detailed step-by-step explanation confirms that the correct answer is D, providing insights into the typical interface naming conventions and configuration practices within the Dell SONiC environment.
質問 # 30
What are two characteristics of route maps in Enterprise SONIC?
- A. Each route map clause has the type values of Match. Set. and Act.
- B. Route-map names are not case-sensitive.
- C. They are a series of commands that contain a matching criterion and action.
- D. The permit or deny clause In route maps permits or rejects the matching routes from being redistributed.
正解：C、D
解説：
Route maps in Enterprise SONIC are used for controlling and modifying routing information. They contain a series of commands with matching criteria and actions. The permit or deny clause within route maps determines whether the matching routes are permitted or denied from being redistributed.
References:
* Dell Technologies SONiC Route Map Configuration Guide
* Dell Networking Configuration Guide
質問 # 31
What is the purpose of the write erase boot command option?
- A. Delete the running configuration and all user accounts.
- B. Delete the startup configuration and the management interface configuration.
- C. Delete the startup and enable zero touch provisioning.
- D. Remove user-installed packages and tile changes.
正解：C
解説：
The write erase boot command option deletes the startup configuration and enables zero touch provisioning (ZTP). This is used to reset the switch to its default state and prepare it for automated configuration through ZTP.
References:
* Dell Technologies SONiC Command Reference Guide
* Switch Configuration Guide
質問 # 32
Which protocol is used to perform an automated installation of Enterprise SONiC?
- A. SFTP
- B. HTTP
- C. SCP
正解：B
解説：
The automated installation of Enterprise SONiC is typically performed using the HTTP protocol. During the Zero Touch Provisioning (ZTP) process, the switch retrieves configuration files and software images from an HTTP server, allowing for automated and streamlined deployments.
References:
* Dell Technologies SONiC documentation
* ONIE User Guide
質問 # 33
What are three characteristics of VLAN translation?
- A. The SVLAN header is replaced with a VNI if the provider network uses a VXLAN overlay.
- B. Trunk or access ports can be configured as members of any VLANs that are not used as an SVLAN.
- C. By default, VLAN stacking is enabled on Z9432F-ON switches.
- D. VLAN translation is not supported on MC-LAG port channel interfaces.
- E. SVLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation is possible on the same interface.
正解：B、D、E
解説：
* VLAN translation is not supported on MC-LAG port channel interfaces (A): This is a restriction commonly seen in network configurations involving Multi-Chassis Link Aggregation (MC-LAG) where VLAN translation capabilities are not applied.
* Trunk or access ports can be configured as members of any VLANs that are not used as an SVLAN (B): This ensures that the VLAN configuration on trunk or access ports is flexible and does not overlap with Service VLANs (SVLANs).
* SVLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation is possible on the same interface (E): This allows for complex VLAN tagging and translation configurations to be applied to the same interface, supporting advanced networking scenarios.
References:
* Dell Technologies SONiC documentation
* Dell Networking Configuration Guide
質問 # 34
An administrator obtains the following CLI output:
How much time does the local system take to detect remote failures without receiving packets?
- A. 900milliseconds
- B. 800 milliseconds
- C. 600 milliseconds
- D. 1200 milliseconds
正解：A
解説：
The local timers in the BFD (Bidirectional Forwarding Detection) configuration show a detect multiplier of 4 and a receive interval of 300ms. The time taken to detect remote failures is calculated as detect multiplier × receive interval = 4 × 300ms = 1200ms.
References:
* Dell Technologies SONiC documentation
* BFD Configuration Guide
質問 # 35
An administrator for a service provider uses this command on a switch:
What is the result of running the command?
- A. Maps the VLAN traffic that an SVLAN identifies to a VNI on a VTEP
- B. Maps the VLAN traffic that a TPID identifies to a VNI on a VTEP
- C. Maps the VLAN traffic that a CVLAN identifies to a VNI on a VTEP
正解：A
解説：
The command interface vxlan vtep-stacking followed by map vni 10010 vlan 100 maps the VLAN traffic that an SVLAN identifies to a VNI on a VTEP. In this context, SVLAN (Service VLAN) is being mapped to a VXLAN Network Identifier (VNI) for encapsulation and transport across the VXLAN tunnel.
References:
* Dell Technologies SONiC documentation
* VXLAN Configuration Guide
質問 # 36
Use the simulator to perform the following configuration task.
1. Map a single-tagged CVLAN 100 to SVLAN 200 translation on PE
switch interface Eth1/1.
2. Map a double-tagged VLAN packet with an outer CVLAN 100 and an
inner dot1q 200 to SVLAN 300 translation on PE switch interface
Eth1/2.
The necessary VLANs and VLAN stacking have already been configured.
正解：
解説：
see the explanation for all step by step solution with all explanation.
Explanation:
Here are the steps to configure the required VLAN translations on a Dell SONiC switch:
* Map a Single-Tagged CVLAN 100 to SVLAN 200 on Interface Eth1/1:
sonic# configure terminal
sonic(config)# interface Ethernet1/1
sonic(config-if-Ethernet1/1)# switchport mode trunk
sonic(config-if-Ethernet1/1)# switchport vlan mapping 100 200
sonic(config-if-Ethernet1/1)# end
sonic# write memory
* Map a Double-Tagged VLAN Packet with Outer CVLAN 100 and Inner dot1q 200 to SVLAN 300 on Interface Eth1/2:
sonic# configure terminal
sonic(config)# interface Ethernet1/2
sonic(config-if-Ethernet1/2)# switchport mode trunk
sonic(config-if-Ethernet1/2)# switchport vlan mapping 100 200 300
sonic(config-if-Ethernet1/2)# end
sonic# write memory
Comprehensive Detailed Step by Step Explanation with References:
* Enter Configuration Mode:
* Access the global configuration mode using the configure terminal command.
* Configure Interface Eth1/1:
* Enter interface configuration mode for Ethernet1/1 using the command interface Ethernet1/1.
* Set the switchport mode to trunk with the command switchport mode trunk.
* Configure the VLAN translation using the switchport vlan mapping 100 200 command, which maps CVLAN 100 to SVLAN 200.
* Exit the interface configuration mode by typing end.
* Save the configuration with write memory.
* Configure Interface Eth1/2:
* Enter interface configuration mode for Ethernet1/2 using the command interface Ethernet1/2.
* Set the switchport mode to trunk with the command switchport mode trunk.
* Configure the double-tagged VLAN translation using the switchport vlan mapping 100 200 300 command, which maps packets with outer CVLAN 100 and inner dot1q 200 to SVLAN 300.
* Exit the interface configuration mode by typing end.
* Save the configuration with write memory.
References:
* Dell Technologies Networking - SONiC
* Dell Enterprise SONiC Deployment Guide
These steps provide a comprehensive guide to configure VLAN translations on a Dell SONiC switch, ensuring that the specific requirements for single-tagged and double-tagged VLAN mappings are met.
質問 # 37
Which three actions are required to route traffic sourced from voice servers to a dedicated Internet link''
- A. Create a policy-map and attach the configured class-map and set the next-hop IP
- B. Create an ACL that selects IPs of voice servers
- C. Create a class-map and attach an ACL with the IP of the next-hop to it.
- D. Create a class-map and attach that ACL.
- E. Attach a policy to the egress interface
正解：A、B、E
解説：
To route traffic from voice servers to a dedicated Internet link, the following steps are necessary:
* Create an ACL that selects IPs of voice servers (B): This ACL will match the traffic coming from the specified IP addresses of the voice servers.
* Create a policy-map and attach the configured class-map and set the next-hop IP (D): The policy-map will use the class-map to identify the voice server traffic and then set the next-hop IP for routing.
* Attach a policy to the egress interface (C): The policy-map must be applied to the egress interface to ensure that the traffic is routed correctly.
References:
* Dell SONiC QoS Configuration Guide
* Dell Technologies InfoHub
Feel free to refer to the Dell SONiC documentation and Dell Technologies InfoHub for more detailed explanations and additional context.
質問 # 38
Configure the system to meet these requirements.
. Configure R1 with AS 1.
. R1 must use a static neighbor assignment for BGP peering.
. R1 needs to redistribute all current and future connected IPv4 routes.
All the required BGP configurations have already been completed on R2.
R2 resides in BGP AS 2.
正解：
解説：
see the explanation for all step by step solution with all explanation.
Explanation:
Here is the step-by-step configuration for R1:
* Enter BGP Configuration Mode:
R1# configure terminal
R1(config)# router bgp 1
* Configure the BGP Neighbor:
R1(config-router)# neighbor 10.10.12.2 remote-as 2
* Redistribute Connected Routes into BGP:
R1(config-router)# redistribute connected
* Exit BGP Configuration Mode and Save the Configuration:
R1(config-router)# end
R1# write memory
Comprehensive Detailed Step by Step Explanation with References:
* Enter BGP Configuration Mode:
* To configure BGP on R1, you need to enter global configuration mode and then enter BGP
* configuration mode with the AS number. Since R1 is in AS 1, you use the command router bgp 1.
* Configure the BGP Neighbor:
* BGP neighbors must be manually specified. In this case, R1's neighbor is R2, which has an IP address of 10.10.12.2 and resides in AS 2. The command neighbor 10.10.12.2 remote-as 2 establishes this relationship.
* Redistribute Connected Routes into BGP:
* To ensure that all connected routes on R1 are advertised via BGP, you use the redistribute connected command. This ensures that any connected IPv4 routes are redistributed into BGP, meeting the requirement to advertise current and future connected routes.
* Exit BGP Configuration Mode and Save the Configuration:
* Once the configuration is complete, you exit BGP configuration mode by typing end and then save the configuration with the write memory command. This ensures that the changes persist after a reboot.
References:
* Cisco BGP Configuration Guide
* Dell Technologies Networking - SONiC
* Dell Enterprise SONiC Deployment Guide
These steps provide a comprehensive guide to configure R1 to meet the specified requirements for BGP peering and route redistribution.
質問 # 39
A deployment requires routing and dynamic access control lists. What bundle must be used for this deployment?
- A. Edge Standard
- B. Enterprise Standard
- C. Enterprise Standard
- D. Cloud Premium
正解：B
解説：
For a deployment that requires routing and dynamic access control lists, the appropriate bundle to use is the Enterprise Standard bundle. This bundle includes advanced routing capabilities and supports dynamic access control lists for comprehensive network management and security.
References:
* Dell Technologies SONiC documentation
* Dell Networking Bundle Configuration Guide
質問 # 40
Refer to the exhibit.
Which three actions can a customer take to change interface Eth1/10 to operate in access mode for VLAN 40?
- A. Delete VLAN 40.
- B. Configure the access mode for the switch port.
- C. Remove the current access VLAN configuration.
- D. Shut down the relevant interface.
- E. Enter it into the relevant interface.
正解：B、C、E
解説：
* Configure the access mode for the switch port (A): This involves setting the switch port to operate in access mode.
* Remove the current access VLAN configuration (D): Before changing the VLAN, the current configuration must be cleared.
* Enter it into the relevant interface (E): Apply the new configuration to the specific interface, Eth1/10.
Steps:
* interface Ethernet 1/10
* no switchport access vlan <current VLAN> (Remove current VLAN)
* switchport mode access
* switchport access vlan 40
References:
* Dell Technologies SONiC documentation
* Dell Networking Configuration Guide
質問 # 41
How many ports are in each port-group on the S5200 series switches?
- A. 0
- B. 1
- C. 2
正解：B
解説：
Each port-group on the S5200 series switches consists of 4 ports. This grouping allows for efficient management and configuration of the switch ports in sets.
References:
* Dell S5200 Series Switches Documentation
* Dell Technologies InfoHub
質問 # 42
How many times must BGP be configured when running symmetric IRB with two VFRs?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
When running symmetric Integrated Routing and Bridging (IRB) with two Virtual Forwarding Routers (VFRs), BGP must be configured twice. Each VFR will have its own BGP instance to handle the routing information.
References:
* Dell Technologies SONiC Routing Guide
* Dell Networking Configuration Guide
質問 # 43
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