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2021 Mar 642-980 free practice questions

Q21. Which three of these would cause two switch fabrics not to merge? (Choose three.) 

A. Two or more switches do not have at least one assigned domain ID in common. 

B. Two switches have different assigned VSANs on the connecting ports. 

C. Two switches have different assigned VLANs on the connecting ports. 

D. The static domain ID does not override the dynamic ID. 

E. The election of the static domain is only determined by the WWNs of the two switches. 

F. The physical connectivity between the two switches is not active. 

Answer: ABF 


Q22. One of your Cisco Nexus Series interfaces has become errdisabled with the error message "DCX-No ACK in 100 PDUs". How often are these acknowledgements exchanged? 

A. 15 seconds 

B. 30 seconds 

C. 45 seconds 

D. 60 seconds 

Answer: B 


Q23. Which statement is true regarding the port channel 100 and 101 configurations between the Nexus 7010 switches? 

A. The vPC assignments on N7010-C2 are incorrectly swapped 

B. N7010-C1 is not allowing any active VLAN traffic to pass on Po100 and Po101. 

C. LACP is not configured to initiate negotiations. 

D. The vPC peer-keepalive is down between the two Nexus 7000 switches. 

Answer: A 

Explanation:

The vPC assignments on N7010-C2 are incorrectly swapped.

The “show vpc” command will show you that the keepalives are active, and that there areactive VLANs. The “show port-channel summary” command shows that LACP is enabled.


Q24. Refer to the exhibit. 

In the initial SAN deployment or after topology changes in the SAN, some hosts cannot communicate with storage. What are three possible causes of the problem? (Choose three.) 

A. misconfigured fabric timers 

B. misconfigured port parameters 

C. VSAN pruning 

D. VSAN trunking issues 

E. VLAN problems 

F. mismatched zoning 

Answer: ABF 


Q25. Which command is critical in order for OTV edge devices to maintain an overlay adjacency with their local peers in a multihomed site via the join interfaces across the Layer 3 network domain? 

A. otv site-identifier 

B. otv extend-vlan 

C. otv site-vlan 

D. otv use-adjacency-server unicast-only 

Answer: A 


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Q26. Refer to the exhibit. 

During a VSAN outage, you come across this configuration. Please select two possible causes? (Choose two) 

A. no common VSANs on both switches 

B. no common trunks 

C. no common VSAN members in the same trunk 

D. VSANs in trunk are the same, but the trunk is not up 

Answer: AC 


Q27. Which three commands will show all the MAC addresses learned from remote sites in an OTV overlay? (Choose three.) 

A. show otv arp-nd-cache 

B. show otv route overlay 

C. show otv vlan 

D. show ip arp 

E. show mac address-table 

F. show otv site 

Answer: ABE 


Q28. 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 


Q29. 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 


Q30. Which statement is true regarding STP? 

A. When the spanning-tree topology is calculated based on default parameters, the path between the source and destination end stations in a switched network might not be ideal. 

B. The path between the source and the destination end stations is always ideal with the default spanning-tree parameter. 

C. The path between the source and the destination end stations is determined by the speed of the link; the slowest link speed will become the root port during the election. 

D. The path between the source and the destination end stations is determined by the lowest MAC address; the lowest MAC address will become the root port during the election. 

Answer: A