Unit 1 of 3
Addressing and VLANs
12 min
+100 points
Learning objectives
When you finish this unit, you will be able to:
- Describe the purpose and usage of MAC addresses and VLANs.
- Describe the purpose and usage of IP addresses, routes, subnet mask / prefix, and gateways.
Layer 2 and Layer 3 addressing
MAC addresses and VLANs
- MAC addresses: hardware identifiers used for local network (Layer 2) delivery.
- VLANs: logical segmentation of a physical network to isolate broadcast domains.
IP addressing
- IP addresses: logical identifiers for network (Layer 3) communication.
- Subnet mask / prefix: defines the network portion of an address.
- Routes: paths packets take to reach destinations.
- Gateways: routers that forward traffic between networks.
Exam focus: apply addressing concepts to basic connectivity and segmentation scenarios.