dell d-snc-dy-00 practice test

Dell SONiC Deploy

Last exam update: Nov 18 ,2025
Page 1 out of 3. Viewing questions 1-15 out of 45

Question 1

Refer to the exhibit.

What can be determined from this show command?

  • A. Traffic below 100 KB is marked as congested
  • B. ECN is enabled for all colors
  • C. ECN is enabled for all DSCP values
  • D. There is a 10% probability that traffic is marked as congested
Mark Question:
Answer:

B


Explanation:
The output of the command show qos wred-policy pfc34 shows the ECN (Explicit Congestion
Notification) configuration for the policy pfc34. The line ecn: ecn_all indicates that ECN is enabled for
all traffic classes (all DSCP values). Additionally, the green-min-threshold, green-max-threshold, and
green-drop-probability settings are shown, but there is no indication of a 10% probability for marking
traffic as congested. Therefore, the correct answer is B.
Reference:
Dell Enterprise SONiC documentation
Dell Technologies InfoHub

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Question 2

How many port channels can be assigned to a single port?

  • A. 8
  • B. 2
  • C. 4
  • D. 1
Mark Question:
Answer:

D


Explanation:
According to the Dell SONiC documentation, a single physical port can be a member of only one port
channel at a time. This restriction ensures the consistency and integrity of link aggregation
configurations.
Reference:
Dell Networking SONiC: How to Configure Port Channels
Dell Technologies InfoHub

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Question 3

Which two elements must be included in the show mclag interface x x command?

  • A. Peer-link port channel number
  • B. MC-LAG domain id
  • C. MC-LAG port channel number
  • D. MC-LAG VLAN id
Mark Question:
Answer:

AC


Explanation:
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.
Reference:
Dell SONiC Command Reference Guide
Dell Technologies InfoHub

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Question 4

Which three actions are required to route traffic sourced from voice servers to a dedicated Internet
link''

  • A. Create a class-map and attach an ACL with the IP of the next-hop to it.
  • B. Create an ACL that selects IPs of voice servers
  • C. Attach a policy to the egress interface
  • D. Create a policy-map and attach the configured class-map and set the next-hop IP
  • E. Create a class-map and attach that ACL.
Mark Question:
Answer:

BCD


Explanation:
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.
Reference:
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.

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Question 5

An administrator is installing Enterprise SONIC in ONIE from an HTTP server.
On which interface should the administrator configure the IP?

  • A. Mgmt1/1/1
  • B. GiO
  • C. ethO
  • D. Eth1/1
Mark Question:
Answer:

C


Explanation:
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.
Reference:
Dell Technologies SONiC documentation
ONIE User Guide

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Question 6

What are three characteristics of VLAN translation?

  • A. VLAN translation is not supported on MC-LAG port channel interfaces.
  • 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. The SVLAN header is replaced with a VNI if the provider network uses a VXLAN overlay.
  • E. SVLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation is possible on the same interface.
Mark Question:
Answer:

ABE


Explanation:
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.
Reference:
Dell Technologies SONiC documentation
Dell Networking Configuration Guide

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Question 7

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. Configure the access mode for the switch port.
  • B. Delete VLAN 40.
  • C. Shut down the relevant interface.
  • D. Remove the current access VLAN configuration.
  • E. Enter it into the relevant interface.
Mark Question:
Answer:

A D E


Explanation:
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
Reference:
Dell Technologies SONiC documentation
Dell Networking Configuration Guide

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Question 8

How many ports are in each port-group on the S5200 series switches?

  • A. 2
  • B. 6
  • C. 4
Mark Question:
Answer:

C


Explanation:
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.
Reference:
Dell S5200 Series Switches Documentation
Dell Technologies InfoHub

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Question 9

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.
Mark Question:
Answer:

A


Explanation:
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.
Reference:
Dell Technologies SONiC Routing Guide
Dell Networking Configuration Guide

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Question 10

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 a CVLAN 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 an SVLAN identifies to a VNI on a VTEP
Mark Question:
Answer:

C


Explanation:
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.
Reference:
Dell Technologies SONiC documentation
VXLAN Configuration Guide

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Question 11

How many times must BGP be configured when running symmetric IRB with two VFRs?

  • A. 3
  • B. 5
  • C. 2
  • D. 4
Mark Question:
Answer:

C


Explanation:
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.
Reference:
Dell Technologies SONiC Routing Guide
Dell Networking Configuration Guide

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Question 12

DRAG DROP
What is the correct order of steps for data flow in asymmetric IRB frame encapsulation?

Mark Question:
Answer:


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.
Reference:
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.

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Question 13

What does the show vian command display?

  • A. All configured VLANs
  • B. Only VLANs in an active state
  • C. All 4094 VLANs
Mark Question:
Answer:

A


Explanation:
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.
Reference:
Dell Technologies SONiC Command Reference Guide
Dell Networking Configuration Guide

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Question 14

Which two things does the no vrrp 100 address-family ipv6 command delete?

  • A. Identifier
  • B. Interface
  • C. Version
  • D. Address-family
  • E. Authentication
Mark Question:
Answer:

AD


Explanation:
The no vrrp 100 address-family ipv6 command deletes the VRRP (Virtual Router Redundancy
Protocol) identifier (A) and the address-family configuration (D) for VRRP group 100. This effectively
removes the VRRP configuration for the specified address family.
Reference:
Dell Technologies SONiC documentation
VRRP Configuration Guide

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Question 15

An administrator obtains the following CLI output:

How much time does the local system take to detect remote failures without receiving packets?

  • A. 600 milliseconds
  • B. 900milliseconds
  • C. 1200 milliseconds
  • D. 800 milliseconds
Mark Question:
Answer:

B


Explanation:
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.
Reference:
Dell Technologies SONiC documentation
BFD Configuration Guide

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