[UPDATED 2026] Read 300-620 Study Guide Cover to Cover as Literally [Q86-Q103]

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[UPDATED 2026] Read 300-620 Study Guide Cover to Cover as Literally

100% Real & Accurate 300-620 Questions and Answers with Free and Fast Updates

NEW QUESTION # 86
Out of the following switches, which are spine platforms that support ACI Multi-Site? (Choose two.)

  • A. Nexus 9364C
  • B. Nexus 9396PX
  • C. Nexus 93180YC-EX
  • D. Nexus 9736C-FX line card

Answer: A,D


NEW QUESTION # 87
Regarding the MTU value of MP-BGP EVPN control plane packets in Cisco ACI, which statement about communication between spine nodes in different sites is true?

  • A. By default, spine nodes generate 1500-bytes packets to exchange endpoints routing information.
    As a result, the Inter-Site network should be able to carry 1800-bytes packets.
  • B. By default, spine nodes generate 1500-bytes packets to exchange endpoints routing information.
    As a result, the Inter-Site network should be able to carry 1500-bytes packets.
  • C. By default, spine nodes generate 9000-bytes packets to exchange endpoints routing information.
    As a result, the Inter-Site network should be able to carry 9100-bytes packets.
  • D. By default, spine nodes generate 9000-bytes packets to exchange endpoints routing information.
    As a result, the Inter-Site network should be able to carry 9000-bytes packets.

Answer: C

Explanation:
Maximum transmission unit (MTU) of Multiprotocol Border Gateway Protocol (MP-BGP) Ethernet Virtual Private Network (EVPN) control plane communication between spine nodes in different sites - By default, the spine nodes generate 9000-byte packets to exchange endpoint routing information. If that default value is not modified, the Inter Site Network (ISN) must support an MTU size of at least 9100 bytes. In order to tune the default value, modify the corresponding system settings in each APIC domain.


NEW QUESTION # 88
Refer to the exhibit. A client reports that the ACI domain connectivity to the fiber channel storage is experiencing a B2B credit oversubscription. The environment has a SYSLOG server for state collection messages. Which value should be chosen to clear the critical fault?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: C


NEW QUESTION # 89
Refer to the exhibit. An engineer must configure a bridge domain inside the Cisco ACI fabric called BD. The configuration must permit EP2 and EP3 to reach EP1. Which configuration must be applied on the bridge domain to accomplish this goal?

  • A. Enable L2 Unknown unicast flooding.
  • B. Configure unicast routing within BD.
  • C. Define the Pervasive gateway on BD.
  • D. Optimize L2 Unknown unicast traffic.

Answer: A

Explanation:
While enabling L2 Unknown Unicast flooding ensures that traffic is flooded to all ports when the destination MAC address is unknown, this does not directly achieve unicast routing between EPs.
Unicast routing is more efficient for known unicast traffic.


NEW QUESTION # 90

Refer to the exhibit. Which Adjacency Type value should be set when the client endpoint and the service node interface are in a different subnet?

  • A. Unicast
  • B. Routed
  • C. L3
  • D. L3Out

Answer: C

Explanation:
Section: External Network Connectivity


NEW QUESTION # 91
Which feature dynamically assigns or modifies the EPG association of virtual machines based on their attributes?

  • A. vzAny contracts
  • B. uSeg EPGs
  • C. standard contracts
  • D. application EPGs

Answer: A


NEW QUESTION # 92
In the context of VMM, which protocol between ACI leaf and compute hosts ensures that the policies are pushed to the leaf switches for immediate and on demand resolution immediacy?

  • A. LLDP
  • B. STP
  • C. VXLAN
  • D. ISIS

Answer: A

Explanation:
Immediate-Specifies that EPG policies (including contracts and filters) are downloaded to the associated leaf switch software upon ESXi host attachment to a DVS. LLDP or OpFlex permissions are used to resolve the VM controller to leaf node attachments.
The policy will be downloaded to leaf when you add host to the VMM switch. CDP/LLDP neighborship from host to leaf is required.
On Demand-Specifies that a policy (for example, VLAN, VXLAN bindings, contracts, or filters) is pushed to the leaf node only when an ESXi host is attached to a DVS and a VM is placed in the port group (EPG).
The policy will be downloaded to leaf when host is added to VMM switch and virtual machine needs to be placed into port group (EPG). CDP/LLDP neighborship from host to leaf is required.
With both immediate and on demand, if host and leaf lose LLDP/CDP neighborship the policies are removed.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/aci-fundamentals/b_ACI-Fundamentals/b_ACI-Fundamentals_chapter_01011.html


NEW QUESTION # 93
Regarding the MTU value of MP-BGP EVPN control plane packets in Cisco ACI, which statement about communication between spine nodes in different sites is true?

  • A. By default, spine nodes generate 9000-bytes packets to exchange endpoints routing information. As a result, the Inter-Site network should be able to carry 9100-bytes packets.
  • B. By default, spine nodes generate 1500-bytes packets to exchange endpoints routing information. As a result, the Inter-Site network should be able to carry 1800-bytes packets.
  • C. By default, spine nodes generate 9000-bytes packets to exchange endpoints routing information. As a result, the Inter-Site network should be able to carry 9000-bytes packets.
  • D. By default, spine nodes generate 1500-bytes packets to exchange endpoints routing information. As a result, the Inter-Site network should be able to carry 1500-bytes packets.

Answer: C

Explanation:
The statement about the MTU value of MP-BGP EVPN control plane packets in Cisco ACI that is true for communication between spine nodes in different sites is that by default, spine nodes generate 9000-bytes packets to exchange endpoints routing information. As a result, the Inter-Site network should be able to carry 9000-bytes packets2. This ensures that the control plane traffic, which is not VXLAN encapsulated, can be properly handled across the sites2.


NEW QUESTION # 94
In the context of VMM, which protocol between ACI leaf and compute hosts ensures that the policies are pushed to the leaf switches for immediate and on demand resolution immediacy?

  • A. STP
  • B. LLDP
  • C. VXLAN
  • D. ISIS

Answer: C

Explanation:
Section: Integrations
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/ACI_Best_Practices/ b_ACI_Best_Practices/b_ACI_Best_Practices_chapter_0101.html


NEW QUESTION # 95
An engineer configures an L3Out between BLeaf1 and Core1. A Cisco Nexus 9000 Series Switch runs in NX-OS mode, and the two devices must peer using OSPF. The devices in the network are configured as follows:
- BLeaf1 has been configured with the IP address 10.1.0.2/31 and the
router ID 0.0.0.2.
- Core1 has been configured with the IP address 10.1.0.3/31 and the
router ID 0.0.0.1.
- On Cisco ACI, the engineer has enabled OSPF using the default OSPF
settings.
- The engineer has configured OSPF on the NX-OS switch using the ip
router ospf ACI_peering area 1 command.
Which action brings up the OSPF adjacency?

  • A. Disable Hello Timer on BLeaf1.
  • B. Change the MTU on Core1.
  • C. Set and Auth Key on Core1.
  • D. Configure Area 1 on BLeaf1.

Answer: D


NEW QUESTION # 96
Which feature dynamically assigns or modifies the EPG association of virtual machines based on their attributes?

  • A. uSeg EPGs
  • B. standard contracts
  • C. vzAny contracts
  • D. application EPGs

Answer: A

Explanation:
The feature that dynamically assigns or modifies the EPG association of virtual machines based on their attributes is uSeg EPGs. uSeg EPGs allow for microsegmentation within the Cisco ACI environment, enabling the dynamic assignment of VMs to EPGs based on attributes such as VM name, tag, or other identifiers


NEW QUESTION # 97
A Cisco ACI fabric has 10 standalone leaf switches. The requirement is for the APIC to select the odd switches as a VPC group and select even switches as another VPC group automatically.
Which VPC protection type must be configured to accomplish this goal?

  • A. serial
  • B. explicit
  • C. consecutive
  • D. reciprocal

Answer: D

Explanation:
In Cisco ACI, VPC protection groups define how leaf switches are paired for VPC domain creation. The protection type determines how APIC automatically groups the switches:
Serial - Switches are paired in ascending order (1-2, 3-4, etc.).
Consecutive - Similar to serial; ensures consecutive node IDs form pairs.
Reciprocal - Switches are grouped based on odd/even distribution (odd nodes together, even nodes together).
Explicit - Manual configuration; you explicitly assign which switches belong to which VPC pair.
Since the requirement is to have all odd-numbered switches grouped together and all even- numbered switches grouped together automatically, the correct type is reciprocal.


NEW QUESTION # 98
Which two IP address types are available for transport over the ISN when they are configured from Cisco ACI Multi-Site Orchestrator? (Choose two.)

  • A. Anycast Overlay Multicast TEP
  • B. Common Pervasive Gateway
  • C. Management IP of the MSO Node
  • D. MP-BGP EVPN Router-ID
  • E. Management IP of APICs

Answer: A,D

Explanation:
https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric- infrastructure/white-paper-c11-739609.html


NEW QUESTION # 99
An engineer is implementing a Cisco ACI data center network that includes Cisco Nexus 2000 Series 10G fabric extenders. Which physical topology is supported?
A)

B)

C)

D)

  • A. Option C
  • B. Option D
  • C. Option A
  • D. Option B

Answer: C


NEW QUESTION # 100
A network engineer is integrating a new Hyperflex storage duster into an existing Cisco ACI fabric The Hyperflex cluster must be managed by vCenter so a new vSphere Distributed switch must be created In addition the hardware discovery must be performed by a vendor-neutral discovery protocol Which set of steps meets these requirements'?

  • A. Option C
  • B. Option D
  • C. Option B
  • D. Option A

Answer: C

Explanation:
To integrate a new Hyperflex storage cluster into an existing Cisco ACI fabric and manage it with vCenter, the following steps should be taken:
Create a new vSphere Distributed Switch (vDS): This is done within the vCenter interface. The vDS acts as a single virtual switch across all associated hosts in the data center, providing centralized management and monitoring of the network configuration1.
Configure the vDS for the Hyperflex cluster: This involves setting up the correct port groups, VLANs, and uplink profiles to ensure proper network segmentation and performance2.
Enable hardware discovery using a vendor-neutral protocol: This could involve using protocols like LLDP (Link Layer Discovery Protocol) or CDP (Cisco Discovery Protocol), which are supported by vCenter and can help in identifying and managing physical network devices3.
Integrate the Hyperflex cluster with ACI using the Application Policy Infrastructure Controller (APIC): This involves creating the necessary policies and profiles in ACI to manage the Hyperflex storage traffic effectively4.
Reference:
Cisco HyperFlex Systems Installation Guide for VMware ESXi1
Cisco HyperFlex Virtual Server Infrastructure 3.0 with Cisco ACI 3.2 and VMware vSphere 6.52 How to Set Up Networking with vSphere Distributed Switches - VMware Docs3 Tutorial: How to integrate HyperFlex and ACI with VMM (VMware) and UCSM4


NEW QUESTION # 101
Which two components are essential parts of a Cisco ACI Virtual Machine Manager (VMM) domain policy configuration? (Choose two.)

  • A. IP address pool association
  • B. Layer 3 outside interface association
  • C. VMM domain profile
  • D. EPG static port binding
  • E. EPG association

Answer: C,E

Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/aci-fundamentals/b_ACI-Fundamenta


NEW QUESTION # 102
What does a bridge domain represent?

  • A. Layer 3 cloud
  • B. tenant
  • C. Layer 2 forwarding construct
  • D. physical domain

Answer: C

Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/2-x/L2_config/ b_Cisco_APIC_Layer_2_Configuration_Guide/ b_Cisco_APIC_Layer_2_Configuration_Guide_chapter_010.html


NEW QUESTION # 103
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