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CompTIA Network+ 2.2 Cisco CCNA 1.3
TechKnowSurge Catalog Interactives Half Duplex or Full Duplex?
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Half Duplex or Full Duplex?

A telegraph, a phone call, a hub, a switch: one direction at a time, or both at once?

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

From the lesson: - **Half duplex:** data flows in only one direction at a time, and has to stop before data can flow back. The telegraph is the example: while one side sends, the other can only listen, unless you run a second line. - **Full duplex:** sending and receiving happen at the same time. - **Hub:** a multi-port repeater. It sends whatever comes in out every other port and cannot send two signals at once, so a hub network is half duplex: one device talks at a time, and two at once collide. - **Switch:** sends each frame toward its one destination, so devices can talk at the same time. A switch works in full duplex.

What you'll learn

Aligned to

CompTIA Network+
2.2 Given a scenario, configure switching technologies and features.
Cisco CCNA
1.3 Compare physical interface and cabling types

Key terms

Half Duplex
A communication mode that allows data to be transmitted in both directions but only one direction at a time.
Full Duplex
A communication mode that allows data to be transmitted in both directions simultaneously.
Hub
A basic Layer 1 network device that receives a signal on one port and repeats it out every other port simultaneously, creating a single shared collision domain among all connected devices. Hubs have been replaced by switches in modern networks because they waste bandwidth and cause collisions.
Switch
A network device that connects devices within a LAN and forwards traffic based on MAC addresses.
Collision Domain
A network segment where data packets can collide with each other when transmitted simultaneously.

Topics

Duplex Half Duplex Full Duplex Hub Switch Interactive Streak Sort

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