DNDNS-200 Online Training

1. Refer to the exhibits.









A network engineer has worked with PC support to install a new PC. After correctly configuring the PC’s interfaces with valid IP addresses, the PC is not able to ping other devices on the 192.168.13.0/24 network. The output from the PC after executing the command ipconfig /all is below: The network engineer executes the command show mac address-tableon the N-series switch to which the PC is connected. The output of the show mac address-tablecommand is below.

What are two reasons that the PC is unable to ping other devices? (Choose two.)

2. The status LED is blinking RED for an N-Series switch.

Which system behavior is indicated?

3. Refer to the exhibit.





A network engineer is called onsite to troubleshoot replication failure and traffic loss. Whenever replication occurs between SAN A and SAN B, users report traffic loss between sites, and replication ultimately fails due to traffic loss.

Based on the topology shown, what is the most likely cause of the traffic loss?

4. Refer to the exhibit of the N-series switches.





The exhibit shows a Layer 2 network between Host A (a Desktop Computer running Windows 7) and Host B (another Desktop Computer running Windows 7) and the list of VLANs Untagged (U) and Tagged (T) at each Ethernet interface: Host A transmits an Ethernet frame untagged on VLAN 1.

What will happen to the Ethernet frame?

5. Refer to the exhibit.





Considering the network topology and information shown, what is an issue with end point devices in network 192.168.102.0/24 that try to route to 192.168.101.0/24?

6. Refer to the Exhibit.





A network engineer receives the output shown when removing MLAG from a pair of N-Series switches.

Which sequence of steps must the engineer complete to remove the vpc peer-link from Port Channel 1?

7. A network engineer has connected a Port Extender to a C-Series switch. While issuing the command “show pe brief” on the C-Series switch, the engineer sees a status of “offline”.

Which two things could be causing the Port-Extender to show “offline”? (Choose two.)

8. Refer to the exhibits.













A customer upgrades its C-Series switch and is experiencing a constant boot loop.

Which two options allow the switch to boot successfully using the newer firmware? (Choose two.)

9. A network engineer needs to summarize the IP range of addresses from 172.16.32.0 to 172.16.35.255.

What is the most effective choice?

10. When facing the front of a C-Series switch, in which direction does air flow?

11. Refer to the exhibit.





A network engineer is installing a new Dell S-Series switch on the rack and notices that the Power LED is blinking yellow.

What is causing this behavior on the switch?

12. The network engineer powers on a new S-Series switch. None of the devices connected to this new switch are responding to pings.

Which two conditions should the network engineer verify? (Choose two.)

13. On an N-Series switch, which three outputs display when a network engineer runs the command show system? (Choose three.)

14. A network engineer configures a new S-Series switch. When the network engineer reloads the switch, the running configuration is defaulted.

What is the most likely cause of the default running configuration?

15. Which three components can be used to deploy 10GbE N-Series switches in a user-port stack configuration? (Choose three.)

16. A network deployment engineer needs to deploy four Dell Networking N1500 series switches. All switches are to be stacked together using 10Gbe ports on each switch and implement OSPF per the deployment plan. The customer has been shipped only the four switches with SAS stacking cables. No other equipment has been shipped.

Which two issues occur when the network engineer tries to stack all four switches and implement OSPF? (Choose two.)

17. Which component is required to deploy the N2000/N3000 Series switches in a stack configuration?

18. Refer to the output.





According to the partial configuration, which two things have occurred? (Choose two.)

19. Refer to the exhibit.





A customer has a C-Series chassis using a 48-port PoE+ line card. A workstation connected to Gi 0/47 passes traffic as expected. When the customer connects a PoE phone to the interface, the phone does NOT power up.

Which configuration should a network engineer set on the Gi 0/47 interface to provide power to the phone?

20. The network engineer has two Dell Networking switches: an N-Series and an S-Series. Both switches have the factory default configuration.

Which phrase correctly describes the current state of spanning-tree on both switches?

21. A network engineer has configured LACP on two connected S-Series switches. LACP is not formed for port TenGigabitEthernet 0/72.

The network engineer has issued “show lacp” to debug the issue.





From the output shown, what are two likely reasons for this result? (Choose two.)

22. Refer to the exhibit.





A customer has a SAN deployment consisting of a single Dell server and Equallogic storage array on a segregated VLAN communicating over a C9010. The storage arrays are reporting excessive ISCSI retransmits.

Which configuration change should a network engineer apply to resolve this issue?

23. A network engineer is verifying the configuration of a LAG connection on an S-Series switch.

Which two commands should the network engineer use to determine the operation of the LAG? (Choose two.)

24. Refer to the exhibits.









A networking engineer is unable to ping from VLAN 30 across two S-Series switches. Port 13 on switch Dell1 and Port 43 on switch Dell2 both have a link status of up.

Why does the ping fail between the two switches?

25. Refer to the exhibit.





On switch S4820-1, commands are entered.

The associated output is as shown.





What correctly defines the state of the Root Bridge for VLAN 2 and VLAN 3?

26. Two Dell S-Series Switches are directly connected.





Which statement describes what will happen when a ping is sent from Dell-1 to Dell-2?

27. Refer to the exhibit.





Two S-Series switches are configured as a VLT pair. The output from the first peer switch is as shown.

Which three results can be determined based on the output shown? (Choose three.)

28. Refer to the exhibits of the S-Series switch.









A networking engineer is unable to pass traffic across interface port 13 and 43 for Dell1 and Dell2 S-Series switches, respectively.

Based on the exhibit, what is the problem with the configuration for the switches?

29. Refer to the exhibit.





The deployment engineer needs to use rapid PVST+ so that some traffic is forwarding on all inter-switch links on these three N-Series Switches. To do so, each switch has been set to the lowest spanning-tree priority value for one of the VLANs.

Given the labeled diagram shown, what Spanning-Tree Priority is Switch B advertising for VLAN 20?

30. Refer to the exhibit.





Given the output from an N-Series switch shown, how many instances of VRF are running?

31. Refer to the exhibits.





















An organization has a network with the following configuration:

* 2x C-Series chassis in a VLT

* Identical 10Gb line cards in each C-Series chassis

* A Hyper-V Server directly connected to Te 0/1 on each C-Series chassis

* A VLT Port-Channel connected to a two port switch independent team on the server used for vSwitch Virtual Machine traffic

The Server Admin reports connectivity issues to the VMs on the server.

* Virtual Machines cannot ping outside of the local Server and cannot be reached from the LAN.

* All Virtual Machines are connected to the same vSwitch.

* All Virtual Machines are able to ping each other internally.

* All Virtual Machines are tagged in VLAN 10.

* All Nics on the Hyper-V Server are up.

What is causing the ping loss?

32. Refer to the exhibit.





On switch S4820-2, commands are entered.

The associated output is a follows:





Which command MUST have been entered previously on switch S4820-1?

33. In an OSPF network, what happens if the OSPF Priority level is set to “0”?

34. A customer needs to convert S-Series stacked switches to a VLT configuration to maintain port-channels from the customer’s server. The customer’s S-Series stack currently uses IEEE 802.1d. The customer wants to upgrade to a faster converging protocol. The servers that connect to the stack use static port-channels, but the customer wants to be IEEE 802.3ad compliant. The customer has approved a maintenance window for the weekend to make these changes.

A network engineer has been given the following plan:

- Confirm the timings of the change window with the customer

- Upgrade the firmware of the S-Series switches

- Configure the single-domain VLT peers

- Configure the port-channels down to the customer’s servers

- Utilize all existing cabling to proceed with the plan

Based on the provided plan, which two pieces of information does the engineer need to proceed? (Choose two.)

the requirement of IEEE 802.1w for VLT Support

the time-out value for ARP-cache

the version of VLT that is required to meet IEEE 802.1s compliance

the requirement for servers to actively negotiate an IEEE 802.3ad LAG

the new 802.1s bridge priority after the cutover

the static mac-address assignment to ensure that all end servers are aware of the Root Bridge

35. Refer to the exhibit.





A customer plans to deploy a two-tier OSPF ECMP Core in the configuration shown. All uplinks to the spine are 40Gbps. All uplinks to the leaves are 10Gbps.

What should be the oversubscription rate for the spine?

36. A customer has two locations that are six miles apart and connected by customer-owned dedicated fiber. The customer tells the deployment engineer that the two sites need to be connected by 10 Gb.

Which two requirements should the deployment engineer verify? (Choose two.)

37. A network engineer needs to install five Dell N-Series switches in a stack for a company that is moving to a new building.

The following items are received:

- 5x Dell N4032 switches

- 5x Power cords

- 5x QSFP+ module card

- 120 CAT6 patch cords

- 1x UPS APC 7000

What needs to be provided to enable the network engineer to complete this task?

38. A network engineer needs to apply Layer 2 port security on an existing N-Series switch. The customer wants to prevent end-users from plugging in their personal laptop in a LAN port at their desk. The company has confirmed that they want to hardset the security to ensure that security only applies to company-supplied computers. The customer has confirmed that computers will not be moving from desk to desk. A total of 10 systems are currently connected. The customer has stated that all switchports must be configured as well. If any other device is plugged in, there will be no network connectivity.

Which additional information must be provided to the engineer to meet the deployment guidelines?

39. Refer to the exhibit.





The trunk links are being over utilized. A network engineer needs to resolve the issue by pruning the trunk links of unnecessary vlans. Each switch must be management accessible via VLAN 1.

What are the allowed vlans on each trunk link?

40. Refer to the exhibit.





Two S-Series switches have been configured as a VLT Pair.

Which three conclusions should be made based on the output shown from the first peer switch? (Choose three.)