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2021 Apr 642-980 practice exam
Q31. Your customer is an ISP providing service to thousands of end customers. Its main concerns are focused on using up the total number of 4096 VLANs per VDC, wasting an unused block of IP addresses, and IP address management. Which technique will address these concerns?
A. create a separate VDC to scale VLAN limitation and upgrade to Cisco Nexus 7018 Switch
B. segment VLANs using secondary IP addresses, which will reduce the management domain
C. create mapping between the VLAN and VSAN to run FCoE to consolidate VLAN and IP addresses
D. use PVLANs, which will solve the scalability problem and provide IP address management
Answer: D
Q32. The installation of a new OTV network connecting two data centers via a service provider LAN has failed verification steps. Which statement explains why certain types of data are not being successfully transferred across the OTV network?
A. The number of extended VLANs across all configured overlays may be greater than 256.
B. The number of MAC addresses on either edge device may exceed 4000.
C. The additional 42-byte OTV overhead, along with the DF bit being set, may cause the service provider to drop packets based on their 1500 MTU settings.
D. Having more than two edge devices per site is not supported.
Answer: C
Q33. Your customer has a dual Cisco Nexus 7010 Switches in its data center. Customer's representatives want to know how to determine if Cisco IOS ISSU is possible on the switches as they are upgrading to version 6.0.4. Which command is useful to determine if the upgrade will be non-disruptive?
A. N7010-C1# show system redundancy ha status
B. N7010-C1# show incompatibility system
C. N7010-C1# install all
D. N7010-C1# show issu test bootflash:n7000-s1-system.6.0.4.bin
Answer: C
Q34. It has been determined that unknown unicast, multicast, and broadcasttraffic is not correctly being switched through either Nexus 7010 switch. Whichstatement best describes the cause of this issue?
A. No VLANs are allowed across the vPC peer link.
B. The MST STP is not enabled on either switch.
C. The default VLAN is inactive.
D. VTP is not configured to handle this type of traffic.
Answer: B
Explanation:
The MST STP is not enabled on either switch From both switches the “show spanning-tree mst” command show that the switch is not in MST mode.
Q35. You are no longer seeing updates to the device-aliases database on your Cisco Nexus 5596UP Switch. Which command is useful to determine if the scope of Cisco Fabric Services application distribution was being administratively limited?
A. N5K2# show cfs region
B. N5K2# show cfs scope
C. N5K2# show cfs locale
D. N5K2# show cfs acl
E. N5K2# show cfs firewall
Answer: A
Update 642-980 exam:
Q36. Which two commands will show all the OTV edge devices and their MAC addresses in the local site? (Choose two.)
A. show otv overlay
B. show otv site
C. show otv vlan
D. show otv adjacency
E. show mac address-table
Answer: BD
Q37. Refer to the exhibit.
When your customers have NPV problems, which three actions should you take? (Choose three.)
A. Verify that the NPV core switch supports NPIV and that it is enabled.
B. Verify that all ports are properly configured and connected.
C. Ensure that the VLAN values are configured on both sides of the NPV core switch.
D. Verify the status of the servers and external interfaces, using the show npv server status command.
E. Ensure that the VSAN value that is configured on the device links is correct.
F. For all the device links, ensure that the port mode on the NPV device is in Full_port mode.
Answer: ABE
Q38. What are the minimum number and maximum number of members that a SAN PortChannel can have?
A. 1, 16
B. 2, 16
C. 1, 32
D. 2, 32
E. 1 minimum with no maximum
F. 2 minimum with no maximum
Answer: A
Q39. In Cisco NX-OS releases prior to 5.2, how should the copp-system-p-policy policy be modified to change how the supervisor module is protected from DoS attacks?
A. Modify the policy map type control-plane copp-system-policy.
B. Open DCNM and modify the "copp-system-p-policy" policy object.
C. Re-run the setup utility and apply a new CoPP profile.
D. In Cisco NX-OS versions prior to 5.2, the CoPP system profile can only be modified from the CMP CLI.
Answer: C
Q40. When using a Cisco Nexus 5500 and Cisco Nexus 7000 Series Switch, how can a port channel interface be configured?
A. Layer 3 interface
B. Layer 3 interface in non-admin VDC only
C. Layer 3 interface in admin VDC only
D. Layer 3 interface in VDC 1 only
Answer: A