[2025年更新]合格できるEMC D-SNC-DY-00試験最新47問題
ゲット2025年最新の無料EMC D-SNC-DY-00試験問題 アンサー
EMC D-SNC-DY-00 認定試験の出題範囲：
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質問 # 12
What are three characteristics of VLAN translation?
- A. By default, VLAN stacking is enabled on Z9432F-ON switches.
- B. VLAN translation is not supported on MC-LAG port channel interfaces.
- C. SVLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation is possible on the same interface.
- D. Trunk or access ports can be configured as members of any VLANs that are not used as an SVLAN.
- E. The SVLAN header is replaced with a VNI if the provider network uses a VXLAN overlay.
正解：B、C、D
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 # 13
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 # 14
Which two elements must be included in the show mclag interface x x command?
- A. MC-LAG port channel number
- B. MC-LAG VLAN id
- C. MC-LAG domain id
- D. Peer-link port channel number
正解：A、D
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 # 15
What is an iBGP neighbor relationship?
- A. Two BGP neighbors have the same autonomous system numbers
- B. Two BGP neighbors share L2VPN EVPN advertisements.
- C. Two BGP neighbors share only private networks.
- D. Two BGP neighbors share only native BGP networks.
正解：A
解説：
An iBGP (Internal Border Gateway Protocol) neighbor relationship is established between two BGP routers within the same autonomous system (AS). This relationship allows for the exchange of routing information within the AS, ensuring that internal routes are propagated correctly.
References:
* Dell Technologies SONiC Routing Guide
* BGP Configuration Guide
質問 # 16
What are the supported modes for the QSFP28 ports on an S5248F?
- A. 1x200G, 1x100 G, 1x40 G, and 4x25 G
- B. 1x100G, 1x40 G, 2x50 G, and 4x25 G
- C. 1x400G, 2x200 G, 4x25 G. and 4x10 G
- D. 1x100G, 1x40 G, 4x25 G, and 4x10 G
正解：B
解説：
The QSFP28 ports on an S5248F switch support multiple modes, including 1x100G, 1x40G, 2x50G, and
4x25G. These modes provide flexibility in network design and enable the switch to support different types of network connections and bandwidth requirements.
References:
* Dell S5248F Switch Data Sheet
* Dell Technologies InfoHub
質問 # 17
Which two additional Q-in-Q VLAN tunnel configuration steps must be followed if the provider network uses a VXLAN overlay?
- A. Map the SVLAN traffic to a VNI.
- B. Configure VLAN Translation.
- C. Configure the BGP route-target and route-distinguisher.
- D. Remove the CVLAN-to-SVLAN mapping.
正解：A、B
解説：
* Configure VLAN Translation (A): VLAN translation is necessary to translate customer VLANs (CVLANs) to service VLANs (SVLANs) for Q-in-Q tunneling in a VXLAN environment.
* Map the SVLAN traffic to a VNI (B): SVLAN traffic must be mapped to a VXLAN Network Identifier (VNI) for encapsulation and transport across the VXLAN overlay network.
References:
* Dell Technologies SONiC documentation
* VXLAN Configuration Guide
質問 # 18
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. 1200 milliseconds
- D. 600 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 # 19
Refer to the exhibit.
What type of route is shown?
- A. Type 3 host route from another VTEP
- B. Type 3 host route from external VTEP
- C. Type 5 host route from another VTEP
- D. Type 2 host route from another VTEP
正解：D
解説：
The exhibit shows a BGP EVPN route in a VXLAN environment. The route type can be determined based on the details provided. Type 2 routes in BGP EVPN are used to advertise MAC address reachability information between VTEPs (Virtual Tunnel End Points). The exhibit indicates a host route from another VTEP, which corresponds to a Type 2 route.
References:
* Dell Technologies SONiC documentation
* BGP EVPN Configuration Guide
質問 # 20
VLAN 40 is configured in Switch A with an anycast-address of 192.168.40.254/24. The ARP neighbor suppression is enabled. Use the simulator to create a VTEP named vtep1 and assign an IP address of
10.10.10.1. Map the VNI 400 to VLAN 40.
正解：
解説：
see the explanation for all step by step solution with all explanation.
Explanation:
Here are the steps to create the VTEP and map the VNI to the VLAN:
* Enter Configuration Mode:
SwitchA# configure terminal
* Create VTEP Interface:
SwitchA(config)# interface vtep1
SwitchA(config-if-vtep1)# ip address 10.10.10.1/24
SwitchA(config-if-vtep1)# exit
* Map VNI 400 to VLAN 40:
SwitchA(config)# vlan 40
SwitchA(config-vlan)# vn-segment 400
SwitchA(config-vlan)# exit
* Enable ARP Neighbor Suppression:
SwitchA(config)# interface Vlan40
SwitchA(config-if-Vlan40)# ip address 192.168.40.254/24
SwitchA(config-if-Vlan40)# vxlan arp-suppression
SwitchA(config-if-Vlan40)# exit
* Save Configuration:
SwitchA# write memory
* Enter Configuration Mode:
* Begin by entering the global configuration mode to make changes to the switch configuration.
* Create VTEP Interface:
* Enter the interface configuration mode for the VTEP interface named vtep1 using interface vtep1.
* Assign the IP address 10.10.10.1/24 to the VTEP interface using the ip address command.
* Exit the interface configuration mode.
* Map VNI 400 to VLAN 40:
* Enter the VLAN configuration mode for VLAN 40 using vlan 40.
* Map the VNI 400 to VLAN 40 using the vn-segment 400 command.
* Exit the VLAN configuration mode.
* Enable ARP Neighbor Suppression:
* Enter the interface configuration mode for VLAN 40 using interface Vlan40.
* Assign the anycast IP address 192.168.40.254/24 to the VLAN interface using the ip address command.
* Enable ARP neighbor suppression using the vxlan arp-suppression command.
* Exit the interface configuration mode.
* Save Configuration:
* Save the configuration to ensure the changes persist after a reboot using the write memory command.
References:
* Dell Technologies Networking - SONiC
* Dell Enterprise SONiC Deployment Guide
These steps provide a comprehensive guide to configure a VTEP and map the VNI to VLAN 40 on Switch A, ensuring the specific requirements for IP addressing and ARP neighbor suppression are met.
質問 # 21
What does the show vian command display?
- A. Only VLANs in an active state
- B. All configured VLANs
- C. All 4094 VLANs
正解：B
解説：
The show vlan command displays all configured VLANs on the device, including their status, ports, and other relevant details. It does not limit the display to only active VLANs or all possible VLANs but shows those that are currently configured.
References:
* Dell Technologies SONiC Command Reference Guide
* Dell Networking Configuration Guide
質問 # 22
Configure a VRF called "VrfGreen" and the static route in it to network 172.16.128.64/28 through next-hop
10.10.10.1. Set an administrative distance of 213.
正解：
解説：
see the explanation for all step by step solution with all explanation.
Explanation:
Here are the steps to configure the VRF and the static route:
* Enter Configuration Mode:
sonic# configure terminal
* Create VRF "VrfGreen":
sonic(config)# ip vrf VrfGreen
* Configure the Static Route:
sonic(config)# ip route vrf VrfGreen 172.16.128.64/28 10.10.10.1 213
* Save Configuration:
sonic# write memory
Comprehensive Detailed Step by Step Explanation with References:
* Enter Configuration Mode:
* Begin by entering the global configuration mode to make changes to the switch configuration.
* Create VRF "VrfGreen":
* Use the command ip vrf VrfGreen to create a new VRF named "VrfGreen". This command sets up a new VRF instance which will isolate the routing table for this VRF from the global routing table and other VRFs.
* Configure the Static Route:
* Use the command ip route vrf VrfGreen 172.16.128.64/28 10.10.10.1 213 to configure the static route.
* ip route vrf VrfGreen specifies that the route should be added to the "VrfGreen" VRF.
* 172.16.128.64/28 is the destination network.
* 10.10.10.1 is the next-hop IP address.
* 213 is the administrative distance, which in this case is set to a non-default value to influence route preference.
* Save Configuration:
* Save the configuration to ensure the changes persist after a reboot using the write memory command.
References:
* Dell Technologies Networking - SONiC
* Dell Enterprise SONiC Deployment Guide
These steps provide a comprehensive guide to configure a VRF and a static route within that VRF on a SONiC-based switch, ensuring the specific requirements for routing and administrative distance are met.
質問 # 23
Refer to the exhibit.
What is the purpose of the static route?
- A. Provide a route to the 12.0.0.0 network.
- B. Provide a route to the 192.168.45.0 network.
- C. Verify that the 12.0.0.0 network is active and reachable.
- D. Verify that devices in VLAN 45 are reachable.
正解：A
解説：
The static route shown in the exhibit S* 12.0.0.0/16 via 192.168.45.254 Vlan45 is used to provide a route to the 12.0.0.0 network. This static route directs traffic destined for the 12.0.0.0/16 network through the gateway at 192.168.45.254, which is associated with VLAN 45. This configuration is typically used to ensure that traffic can reach a specific network via a defined path.
References:
* Dell Technologies SONiC Routing Guide
* Dell Networking Configuration Guide
質問 # 24
Refer to the exhibits.
PC1 has a valid address on the 192.168.10.0 network, and PC2 has a valid address on the 192.168.20.0 network.
What happens when a ping command is issued between PC1 and PC2?
- A. The ping is successful because there are two routes from switch1 to switch2 which are connected to PC2.
- B. The ping is unsuccessful because there is no route from switch 1 to the 192.168.20.0 network.
- C. The ping is successful because there is a route to 10.0.1.1, which is connected to 1(10.2.2, which is connected to PC2.
- D. The ping is unsuccessful because there is no route to the VLAN 10 gateway address of 192.168.10.254.
正解：B
解説：
* Network Topology Analysis:
* PC1 is on VLAN 10 with an IP address in the 192.168.10.0/24 subnet.
* PC2 is on VLAN 20 with an IP address in the 192.168.20.0/24 subnet.
* The network uses OSPF for routing between the switches.
* The OSPF area is 0, and all switches have loopback interfaces for OSPF.
* Routing Table Examination (from switch1):
* The show ip route command output from switch1 provides a detailed look at the routing table.
* Routes to the 192.168.10.0/24 network (directly connected via Vlan10) are present.
* No routes to the 192.168.20.0/24 network are listed in switch1's routing table.
* Explanation:
* For PC1 to communicate with PC2, switch1 must have a route to the 192.168.20.0/24 network.
* The absence of a route to the 192.168.20.0/24 network in switch1's routing table means that switch1 cannot forward packets destined for 192.168.20.0/24.
* Therefore, any ping from PC1 to PC2 will be unsuccessful as switch1 does not know how to route packets to PC2's network.
* Verification with Dell SONiC:
* In Dell SONiC environments, OSPF is configured to ensure dynamic routing.
* The configuration must include all necessary networks for inter-switch routing.
* If a network (like 192.168.20.0/24) is not included in OSPF configurations on switch1, routes to that network will not be advertised or learned, leading to failed connectivity tests like the ping from PC1 to PC2.
References:
* Dell Enterprise SONiC Deployment Guide
* Dell Technologies Networking - SONiC
質問 # 25
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 # 26
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 # 27
An administrator is installing Enterprise SONIC in ONIE from an HTTP server.
On which interface should the administrator configure the IP?
- A. Eth1/1
- B. GiO
- C. Mgmt1/1/1
- D. ethO
正解：D
解説：
When installing Enterprise SONIC from an HTTP server using the Open Network Install Environment (ONIE), the management interface typically used for network installations is eth0. This is the default interface ONIE uses for network connectivity to retrieve installation images and other configuration files.
References:
* Dell Technologies SONiC documentation
* ONIE User Guide
質問 # 28
What is ECMP?
- A. A routing protocol database filter supporting a maximum of four paths
- B. A routing protocol with multipath support
- C. A round-robin path distribution mechanism
- D. A Layer 3 routing feature to forward traffic using multiple available paths
正解：D
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 # 29
What interface must be selected when configuring the management port from within the MF-CLI environment?
- A. Management 0
- B. eth0
- C. ma 0/1
- D. mgmt 1/1/1
正解：B
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
Refer to the exhibit.
The router ID has not been manually configured. What router ID is used for Switch 3?
- A. 10.0.2.1
- B. 10.0.1.1
- C. 192.168.100.2
- D. 192.168.100.0
正解：B
解説：
In the absence of a manually configured router ID, OSPF typically uses the highest IP address on the switch's active interfaces. For Switch 3 in the exhibit, the highest IP address is 10.0.1.1 on Loopback 0. Therefore,
10.0.1.1 is used as the router ID for Switch 3.
References:
* Dell Technologies SONiC documentation
* OSPF Configuration Guide
質問 # 31
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