Switches & Hubs for A+
Short answer
A switch forwards frames to a specific destination port, reducing unnecessary traffic on the LAN. A hub repeats incoming signals to all ports, which can cause collisions on older shared-media networks. Because hubs are largely obsolete, the correct answer in most modern wired scenarios is a switch.
Why it appears on the exam
- Direct recognition: "Which device connects wired devices and forwards traffic intelligently?" -> switch. - Contrast item: "Which legacy device repeats traffic to all ports?" -> hub.
Key concepts
Concept 1
Required terms
switch: A LAN device that forwards frames to the correct port based on destination information; standard modern device for wired networks. hub: A legacy device that repeats incoming signals to all ports; broadcasts traffic broadly and has largely been replaced by switches.
Example
Example 1: A small office with multiple wired ports in a closet and targeted traffic -> switch.
Concept 2
How Switches & Hubs works
A switch forwards frames to a specific destination port, reducing unnecessary traffic on the LAN. A hub repeats incoming signals to all ports, which can cause collisions on older shared-media networks. Because hubs are largely obsolete, the correct answer in most modern wired scenarios is a switch.
Example
Example 2: An exam contrasts targeted forwarding versus broadcast behavior -> hub is presented as the legacy option.
Concept 3
Common confusion
Learners sometimes assume a central physical box is always a router; clarify whether the scenario describes local LAN forwarding (switch) or network-to-network forwarding (router). Also avoid introducing spanning tree or VLAN internals; those are outside this lesson focus.
Example
Example 1: A small office with multiple wired ports in a closet and targeted traffic -> switch.
Concept 4
Core 1 (220-1201) question cues
Direct recognition: "Which device connects wired devices and forwards traffic intelligently?" -> switch; Contrast item: "Which legacy device repeats traffic to all ports?" -> hub.
Example
Example 2: An exam contrasts targeted forwarding versus broadcast behavior -> hub is presented as the legacy option.
Sample questions
Select an answer to reveal the explanation. For tracked practice and weak-area review, use the Cultiv8 app.
Q1.A technician is troubleshooting this situation: Example 1: A small office with multiple wired ports in a closet and targeted traffic -> switch. What should they identify?
Q2.A technician sees this situation: Example 2: An exam contrasts targeted forwarding versus broadcast behavior -> hub is presented as the legacy option. Which answer should they choose?
Q3.A support scenario about Switches & Hubs feels similar to a nearby topic. What is the safest way to choose an answer?
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