Implementing Cisco Application Centric Infrastructure - Advanced (600-660 DCACIA)

Here you have the best Cisco 600-660 practice exam questions

You have 60 total questions to study from
Each page has 5 questions, making a total of 12 pages
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This questions were last updated on February 4, 2026
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Question 1 of 60

Exam 600-660: Question 1 - Image 1

Refer to the exhibit. How is the ARP request from VM1 forwarded when VM2 is not learned in the Cisco ACI fabric?

A.

Leaf 101 forwards the ARP request to one of the proxy VTEP spines.

B.

POD1 spine responds to the ARP request after the POD1 COOP is updated with the VM2 location.

C.

Leaf 101 encapsulates the ARP request into a multicast packet that is destined to 225.0.37.192.

D.

Leaf 101 switch consumers the ARP reply of VM2 to update the local endpoint table.

Suggested Answer: C

In the exhibit, ARP flooding is disabled, and the option for IP data-plane learning is enabled with the 'Limit IP Learning to Subnet' option also checked. These settings suggest that multicast-based forwarding is used for unknown unicast and ARP traffic. Therefore, if VM2 is not learned in the Cisco ACI fabric, Leaf 101 would encapsulate the ARP request into a multicast packet destined to 225.0.37.192 for efficient distribution across the network.

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Question 2 of 60

Which approach does Cisco ACI use to achieve multidestination packet forwarding between leaf switches in the same fabric?

A.

Map VXLAN VTEP to the multicast group

B.

Map VXLAN to PIM-SM protocol

C.

Map VXLAN VNI to the multicast group

D.

Map VXLAN to PIM-DM protocol

Suggested Answer: C

Cisco ACI maps VXLAN VNIs (Virtual Network Identifiers) to multicast groups for efficient forwarding of multidestination traffic between leaf switches in the same fabric. This approach allows the network to handle multicast, broadcast, and unknown unicast traffic effectively by using the multicast group to distribute these types of packets across the relevant switches.

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Question 3 of 60

What does the VXLAN source port add to the overlay packet forwarding when it uses the hash of Layer 2, Layer 3, and Layer 4 headers of the inner packet?

A.

ECMP

B.

TCP optimization

C.

disabled fragmentation

D.

jumbo frames

Suggested Answer: A

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Question 4 of 60

Which two actions are the Cisco best practices to configure NIC teaming load balancing for Cisco UCS B-Series blades that are connected to the Cisco ACI leaf switches? (Choose two.)

A.

Create vPC+

B.

Enable LACP active mode

C.

Create PAgP

D.

Create vPC

E.

Enable MAC pinning

Suggested Answer: B, E

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Question 5 of 60

Exam 600-660: Question 5 - Image 1

An organization migrates its virtualized servers from a legacy environment to Cisco ACI. VM1 is incorrectly attached to PortGroup IT|3TierApp|Web. Which action limits IP address learning in BD1?

A.

Enable Enforce Subnet Check

B.

Enable Rouge Endpoint Control

C.

Enable GARP-based EP Move Detection Mode

D.

Disable Remote EP Learn

Suggested Answer: A

To limit IP address learning in BD1, the appropriate action to take is to enable Enforce Subnet Check. This setting ensures that only IP addresses within the defined subnet are learned, preventing the learning of any IP addresses that do not belong to the specified subnet, thus maintaining the security and integrity of the network.

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