Which routing feature is important for creating scalable and efficient network traffic management?

Question

Options

• AAccess Control Lists (ACLs)
• BPort Security
• CQuality of Service (QoS)
• DSwitchport mode access

• A
  11% (4)
• B
  9% (3)
• C
  77% (27)
• D
  3% (1)

Explanation

Quality of Service (QoS) is the correct answer because it directly controls how network traffic is prioritized, queued, and managed - enabling administrators to allocate bandwidth efficiently and ensure critical traffic (like VoIP or video) is delivered reliably at scale.

Why the distractors are wrong:

• A. ACLs filter traffic based on rules (permit/deny), but they don't manage traffic flow or bandwidth - they're a security and filtering tool, not a traffic management one.
• B. Port Security restricts which MAC addresses can connect to a switch port - purely a Layer 2 security feature with no impact on traffic prioritization or scalability.
• D. Switchport mode access simply designates a port as an access (non-trunk) port for a VLAN - a basic switching configuration, not a traffic management feature.

Memory tip: Think of QoS as a "traffic cop" that gives emergency vehicles (priority traffic) the green light - it manages the flow, while ACLs and Port Security are "bouncers" that just decide who gets in.

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