Computer Networking › Section F · The link layer and LANs › Topic F.4
Switched LANs: MAC addresses, ARP, switches, and VLANs
Inside an office, a campus or a home, devices reach one another through Ethernet switches. Four ideas make this work: MAC addresses, the Address Resolution Protocol, self-learning switches and virtual LANs.
In this topic
- Two addresses for two jobs
- The Address Resolution Protocol
- Worked example: ARP and the gateway
- The Ethernet frame
- Switches filter, forward and learn
- Worked example: a switch learns
- Switches versus routers, and loops
- Virtual LANs
- Common mistakes to avoid
- Key takeaways
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