Which of the following descriptions about guaranteed bandwidth and maximum bandwidth is incorrect?

Question

Options

• AGuaranteed bandwidth and maximum bandwidth can be set on a per-IP/user basis
• BIf the traffic is greater than the maximum bandwidth, directly discard the traffic exceeding the
• CIf the traffic is less than the guaranteed bandwidth, this part of the traffic will compete freely with
• DGuaranteed bandwidth and maximum bandwidth settings for IP or users can achieve more

• A
  7% (3)
• B
  2% (1)
• C
  84% (38)
• D
  7% (3)

Explanation

Option C is the incorrect description because guaranteed bandwidth is specifically designed to protect traffic up to that threshold - it is reserved and prioritized, not left to compete freely with other traffic. Allowing sub-guaranteed traffic to "compete freely" would defeat the entire purpose of the guarantee, which is to ensure a minimum delivery level regardless of network congestion.

Why the distractors are correct (and therefore not the answer):

• A is accurate - virtually all enterprise QoS implementations allow granular per-IP or per-user bandwidth policies, so this is a true statement.
• B is accurate - traffic policing works by dropping (discarding) any packets that exceed the configured maximum bandwidth ceiling; this is standard rate-limiting behavior.
• D is accurate - per-IP/per-user bandwidth controls do enable more precise traffic management and fairer resource allocation, which is a genuine benefit of these settings.

Memory tip: Think of guaranteed bandwidth as a reserved seat on a train - your seat is yours no matter how crowded the train gets; you never have to compete for it. Maximum bandwidth is the train's top speed - exceed it and you simply don't move. If you're already in your reserved seat (below guaranteed bandwidth), there's no competition involved at all.

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