TechKnowSurge
CompTIA Network+ 1.2 Cisco CCNA 1.13 Cisco CCST Networking 4.5
TechKnowSurge Catalog Interactives Learning or Forwarding?
InteractiveNetworkFree

Learning or Forwarding?

Is the switch learning (source address, building its table) or forwarding (destination address, choosing a port)?

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

About this interactive

The lesson's switch has two jobs: - **Learning:** a frame is sent with its source MAC address. The switch records that address and the port the frame came in on. Over time that builds the MAC address table. - **Forwarding:** the switch reads where the frame is going, the destination MAC address, finds it in the table, and sends the frame directly to that device's port. The result: no collisions between ports, and far fewer security concerns, because traffic is not sent out to every device. Both jobs read Layer 2 information, so a switch is a Layer 2 device.

What you'll learn

Aligned to

CompTIA Network+
1.2 Compare and contrast networking appliances, applications, and functions.
Cisco CCNA
1.13 Describe switching concepts
Cisco CCST Networking
4.5 Explain basic switching concepts

Key terms

Switch
A network device that connects devices within a LAN and forwards traffic based on MAC addresses.
MAC Address Table
A table maintained by a switch (also called the CAM table) that maps source MAC addresses to the switch ports on which those devices were learned. When a frame arrives, the switch looks up the destination MAC in this table to forward it out only the correct port rather than flooding all ports.
Media Access Control
MAC
A sublayer of the Data Link layer that controls how devices on a network gain access to a medium and transmit data.
Layer 2
The Data Link layer of the OSI model, responsible for MAC addressing and frame delivery on a local network.
Collision Domain
A network segment where data packets can collide with each other when transmitted simultaneously.

Topics

Switch Mac Address Table Mac Learning Frame Forwarding Layer 2 Interactive Streak Sort

About TechKnowSurge

TechKnowSurge builds IT and cybersecurity professionals through hands-on, concept-first training built around real understanding — not memorization. Free interactive tools, structured programs, and 25+ years of real-world experience, all in one place.

Explore free tools and programs →