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Latest EMC DES-5121 Exam Practice Questions and Answers
QUESTION 1
Refer to the Exhibit.
Switch-1(config)# radius server host 10.1.1.111 Switch-1(config-radius)# key “secretkey” Switch-1(config-radius)# exit
Switch-1(config)# aaa authentication login “LOCAL-AUTH” local Switch-1(config)# aaa authentication login “REMOTEAUTH” radius local Switch-1(config)# aaa authentication enable “REMOTE-AUTH” radius enable Switch-1(config)# aaa
authentication login default tacacs local Switch-1(config)# aaa authentication enable default tacacs enable
Switch-1(config)# line telnet Switch-1(config-telnet)# login authentication “REMOTE-AUTH” Switch-1(config-telnet)# exit
Switch-1(config)# line ssh Switch-1(config-ssh)# login authentication default Switch-1(config)# exit Switch-1(config)# line
console Switch-1(config-line)# login authentication “LOCAL-AUTH” Switch-1(config-line)# exit
Which authentication method will be used if a user tries to log into the switch when accessing through SSH?
A. RADIUS then fails over to a local user account
B. Local user account
C. TACACS then fails over to a local user account
D. None
Correct Answer: C
QUESTION 2
Switch-1(config)# interface tengigabitethernet 1/0/1 Switch-1(config)# switchport mode access Switch-1(config)#
switchport trunk allowed VLAN 10, 20 Switch-1(config)# Switch-1(config)# interface tengigabitethernet 1/0/3
Switch-1(config)# switchport mode access Switch-1(config)# switchport access VLAN 10
Switch-2(config)# interface tengigabitethernet 1/0/2 Switch-2(config)# switchport mode trunk Switch-2(config)#
switchport trunk allowed VLAN 10, 20 Switch-2(config)# Switch-2(config)# interface tengigabitethernet 1/0/6
Switch-2(config)# switchport mode access Switch-2(config)# switchport access VLAN 20
A network administrator is troubleshooting why Host 1 cannot communicate with Host 2.
Based on the switch output shown in the exhibit, what is the reason for the communication issue?
A. Port Te1/0/1 on Switch-1 is configured incorrectly
B. Port Te1/0/2 on Switch-2 is configured incorrectly
C. Port Te1/0/3 for Host 1 is configured incorrectly on Switch-1
D. Port Te1/0/6 for Host 2 is configured incorrectly on Switch-2
Correct Answer: A
QUESTION 3
If a group of routers is running VRRP with a virtual router ID of 155, which MAC address will be used to respond to the
ARP requests for the virtual IP?
A. 0000-5E00-0155
B. 0000-5E00-019B
C. 0001-5500-005E
D. 0001-9B00-005E
Correct Answer: B
QUESTION 4
A network administrator has configured a 4-port port-channel between two Dell EMC Campus networking switches. The
physical interfaces show as administratively up and operationally up on both switches. However, the port-channel shows
as operationally up on Switch A and operationally down on Switch B.
What is a potential reason for the inconsistent port-channel state?
A. Switch A is configured to use dynamic port-channels and Switch B is configured to use static port-channels
B. Ports in the port-channel on Switch A are all the same speed but the ports in the port-channel on Switch B are a mix
of speeds
C. Switch A is configured using channel-group # mode on and Switch B is configured using channel-group # mode auto
D. N-Series supports a maximum number of physical interfaces that can be included in port-channel on a per-device
basis
Correct Answer: C
QUESTION 5
A network administrator added a new Dell EMC N-Series switch into their network with RSTP configured. The spanning-tree priority on all existing switches has been left at the default value. If the administrator wants this new switch to
become the spanning-tree root, which command should be used?
A. spanning-tree priority 4096
B. spanning-tree priority 32768
C. spanning-tree priority 36864
D. spanning-tree priority 61440
Correct Answer: A
Reference: https://www.dell.com/support/article/en-us/how10394/how-to-manage-rapid-spanning-tree-rstp-thrucommand-line-on-dell-networking-powerconnect-switches?lang=en
QUESTION 6
The exhibit represents a topology with all Dell EMC N4000 Series switches with RSTP enabled. In addition, the switches
are using the default configuration on all ports and protocols. Which port number will be blocked by the spanning tree?
A. Te 1/0/3
B. Te 1/0/4
C. Te 1/0/5
D. Te 1/0/6
Correct Answer: C
QUESTION 7
A network administrator wants to configure an ACL to deny traffic for a specific source IP and source UDP port.
Which type of ACL should be used?
A. Layer 2 Standard ACL
B. Layer 2 Extended ACL
C. Layer 3 Standard ACL
D. Layer 3 Extended ACL
Correct Answer: D
QUESTION 8
Which ports on a spanning tree root switch are always forwarding?
A. Alternate ports
B. Designated ports
C. Backup ports
D. Root ports
Correct Answer: B
QUESTION 9
How many untagged VLANs are allowed on a switch port mode trunk interface?
A. 0
B. 1
C. 128
D. 4096
Correct Answer: B
QUESTION 10
N4032F#show interfaces status N4032F#show interfaces port-channel 1
Hash Algorithm Type 1 – Source MAC, VLAN, EtherType, source module, and port Id 2 – Destination MAC, VLAN,
EtherType, source module and port Id 3 – Source IP and source TCP/UDP port 4 – Destination IP and destination
TCP/UDP port 5 – Source/Destination MAC, VLAN, EtherType, source MODID/port 6 – Source/Destination IP and
source/destination TCP/UDP port 7 – Enhanced hashing mode
A network administrator has reported poor network performance to an application server. After reviewing the logs, you
determine that the server is using 100 percent of the available bandwidth on its network port. As shown in the exhibit,
you configure a second link and a 2-member port-channel to an application server in an effort to increase performance.
However, during testing, network performance has not improved.
What is a possible reason why there has been no increase in performance?
A. Application is using a single I/O flow
B. File server needs to be configured with LACP
C. Minimum links need to be increased to “2”
D. Port-channel needs load balancing enabled
Correct Answer: A
QUESTION 11
What describes the POE+ capabilities of the Dell EMC N1100P Series?
A. Supported on any of the first halves of switch ports or the first 12 switch ports, whichever is fewer. May only be enabled
on a maximum of half of the supported ports.
B. Supported on any of the first 12 switch ports or all switch ports, whichever is fewer. May only be enabled on a
maximum of half of the supported ports.
C. Supported on all of the first 12 switch ports or all switch ports, whichever is fewer.
D. Supported on all of the first halves of switch ports or the first 12 switch ports, whichever is fewer.
Correct Answer: B
QUESTION 12
After setting up the VoIP configuration, a network administrator issues the following commands with the results shown:
console# show voice VLAN Administrative Mode………………………Enable
console# show voice VLAN it gi 1/0/2
Interface………………………………….Gi1/0/2
Voice VLAN Interface Mode……………Enabled
Voice VLAN ID………………………….10
Voice VLAN COS Overwrite……………False
Voice VLAN DSCP Value……………….46
Voice VLAN Port Status…………………Enabled
Voice VLAN Authentication…………….Disabled
Based on this information, what is the Layer 3 QoS value?
A. 5
B. 10
C. 46
D. Gi1/0/2
Correct Answer: C
QUESTION 13
How does the weighted Queue Scheduler prioritize packets?
A. Scheduler prioritizes weighted queues over any strict queues
B. Weights are calculated based on the number of packets
C. Weights are used to calculate the number of bytes
D. Weight is assigned to each port
Correct Answer: C
Reference: https://infohub.delltechnologies.com/static/media/6582046d-70f0-4ab6-ba72-2c0b9cf26649.pdf page 6
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