Which mechanism reduces the network flooding caused by host ARP learning behavior?

Question

Options

• AARP suppression
• Bstorm control
• Croot guard
• DBPDU guard

• A
  93% (40)
• C
  2% (1)
• D
  5% (2)

Explanation

ARP suppression directly addresses the flooding problem by intercepting ARP requests at the network edge (typically on VXLAN or overlay networks) and responding locally using a cached MAC-to-IP binding table, preventing the broadcast from flooding across all network segments. This is especially relevant in large data center environments where ARP broadcasts from thousands of hosts would otherwise saturate the fabric.

Why the distractors are wrong:

• B. Storm control limits the rate of broadcast/multicast traffic generically but doesn't intelligently suppress or answer ARP requests - it just drops excess traffic above a threshold.
• C. Root guard is a Spanning Tree Protocol feature that prevents unauthorized switches from becoming the root bridge - completely unrelated to ARP.
• D. BPDU guard is also an STP feature that shuts down ports receiving Bridge Protocol Data Units from unexpected devices - again, unrelated to ARP flooding.

Memory tip: Think of ARP suppression as a "smart proxy" - instead of letting every ARP request flood the network, a central control plane answers on behalf of the destination host. The word "suppression" itself is the clue: you are suppressing (stopping) the flood at the source.

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