CCNA R&S Question of the Week: Switch vs. Hub

How does a switch differ from a hub?

A. A switch does not induce any latency into the frame transfer time.
B. A switch tracks MAC addresses of directly-connected devices.
C. A switch operates at a lower, more efficient layer of the OSI model.
D. A switch decreases the number of broadcast domains.
E. A switch decreases the number of collision domains.

Reveal Answer

Answer: B.

Hubs are considered layer one devices. They are multiport repeaters. They full traffic to all ports, all the time. Switches (layer 2 switches) are layer two devices and forward traffic based on learning the layer 2 addressing (MAC address) of devices and determine the need to forward based on the location of the destination, relative to the source.

Related Resources
Cisco White Papers

Related Course
CCNAX v2.0 — CCNA Routing and Switching Boot Camp
ICND1 v2.0 — Interconnecting Cisco Networking Devices, Part 1
ICND2 v2.0 — Interconnecting Cisco Networking Devices, Part 2

CCNA R&S Question of the Week Series

• CCNA R&S Question of the Week: Full-Duplex Ethernet Network
• CCNA R&S Question of the Week: OSI Model Layer
• CCNA R&S Question of the Week: Connection-Oriented Service
• CCNA R&S Question of the Week: No Acknowledgment of Receipt
• CCNA R&S Question of the Week: Switch vs. Hub

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