2V0-622D · Question #184
vSphere 6.5 introduced MAC learning capabilities for VMware's virtual switches. What three benefits will it provide? (Choose three.)
The correct answer is A. Reduced memory consumption C. Prevent packet flooding inside the vSwitch D. Reduced consumption of extra CPU cycles.. MAC learning in vSphere 6.5 virtual switches allows the switch to build a forwarding table dynamically, eliminating unnecessary packet flooding and the associated CPU and memory overhead.
Question
vSphere 6.5 introduced MAC learning capabilities for VMware's virtual switches. What three benefits will it provide? (Choose three.)
Options
- AReduced memory consumption
- BIncreased network throughput.
- CPrevent packet flooding inside the vSwitch
- DReduced consumption of extra CPU cycles.
How the community answered
(39 responses)- A95% (37)
- B5% (2)
Why each option
MAC learning in vSphere 6.5 virtual switches allows the switch to build a forwarding table dynamically, eliminating unnecessary packet flooding and the associated CPU and memory overhead.
By maintaining a MAC address table, the vSwitch avoids storing and replicating flood-broadcast state across all ports, lowering the memory footprint of the virtual switch.
MAC learning does not inherently increase throughput; its benefit is efficiency through flood elimination, not raw bandwidth improvement.
With a learned MAC table, the vSwitch can forward frames directly to the correct port rather than flooding them to every port on the segment, preventing intra-switch broadcast storms.
Eliminating per-packet flooding reduces the number of interrupts and copy operations the host CPU must handle for switching, lowering CPU consumption.
Concept tested: MAC learning benefits in vSphere virtual switches
Source: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.networking.doc/GUID-DC400B74-7ED5-42AF-A4F3-0E2D3F76D77F.html
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