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

October 30, 2015 Johnny Bass Cisco, Cloudera, Featured, Professional Development, Project Management, Routing & Switching, Technology, Training in Business

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.

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

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