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Difficulty: EasyNetwork Components Roles and Functions

A network technician installs a standard Layer 2 Ethernet switch to connect multiple client computers in an office network. What is the primary operational function of this device?

  1. Forwarding Ethernet frames based on destination MAC addresses while separating collision domains per portAnswer
  2. B
    Forwarding IPv4 packets based on destination IP addresses while breaking up broadcast domains on every port
  3. C
    Hosting and managing virtual machine instances directly on bare-metal hardware as a hypervisor
  4. D
    Gathering neighboring device hardware details using Layer 3 routing protocol hello packets

Answer

The primary operational function of a Layer 2 switch is forwarding Ethernet frames using MAC addresses and placing each switch port into its own independent collision domain.
A standard Layer 2 switch learns source MAC addresses and builds a MAC address table to forward incoming frames to their intended destination ports. Each physical port on the switch acts as an isolated collision domain, preventing frame collisions.

Step-by-Step Solution

1
Identify the OSI operational layer of a standard Ethernet switch.
Standard Layer 2 switches operate at the Data Link Layer (Layer 2).
Layer 2 switches process Ethernet frame headers rather than inspecting Layer 3 IP packet headers for forwarding decisions.
2
Determine the forwarding logic and domain boundaries established by the switch.
The switch inspects destination MAC addresses to forward frames and isolates collision domains on each individual port, while leaving all ports in a single broadcast domain by default.
Port micro-segmentation eliminates collisions on full-duplex Ethernet connections while preserving broadcast reachability.

Key Concept

Layer 2 Switch Roles and Collision Domain Isolation
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Topics

Network Components Roles and Functions

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