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Question

Difficulty: EasyNetwork Components Roles and Functions

A network administrator needs to segment an enterprise network to prevent broadcast traffic sent by one host from reaching devices in other departments. Which network component natively creates separate broadcast domains at Layer 3?

  1. RouterAnswer
  2. B
    Standard Layer 2 switch
  3. C
    Hosted Type 2 hypervisor
  4. D
    Layer 2 discovery protocol service

Answer

A router natively breaks up broadcast domains because it operates at Layer 3 and blocks Layer 2 broadcast traffic from passing between its interfaces.
Routers operate at Layer 3 (Network Layer) and break up broadcast domains by default because they do not forward Layer 2 broadcast frames between interfaces.

Step-by-Step Solution

1
Analyze the operational requirements specified in the scenario.
The requirement is to isolate broadcast traffic so broadcast frames are not flooded to all hosts.
Broadcast frames flood across all ports within a single broadcast domain.
2
Evaluate the function of Layer 2 vs. Layer 3 network components.
Layer 2 switches separate collision domains but forward broadcasts to all ports in the same VLAN. Routers work at Layer 3 and drop Layer 2 broadcast packets by default.
Routers terminate Layer 2 broadcast domains on each routed interface.

Key Concept

Network Components Roles and Functions
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Topics

Network Components Roles and Functions

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