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Cloud computing has transformed how networks are designed and managed. Instead of buying physical hardware, you provision virtual network infrastructure using software-defined networking (SDN). This lesson explores cloud networking concepts, compares major providers, and outlines your next steps for advancing in computer networking.
Cloud networking is the practice of building and managing network infrastructure in a cloud environment. All the networking concepts you have learned — IP addressing, subnetting, routing, firewalls, load balancing — still apply, but they are implemented as virtual resources managed through APIs and web consoles.
| Aspect | Traditional | Cloud |
|---|---|---|
| Provisioning | Buy and rack hardware (weeks) | Create via API or console (seconds) |
| Scaling | Buy more hardware | Click a button or auto-scale |
| Cost | Capital expenditure (CapEx) | Operational expenditure (OpEx), pay-as-you-go |
| Management | Physical access, CLI, SNMP | Web console, CLI, Infrastructure as Code |
| Redundancy | Design and build yourself | Built into the platform (multi-AZ, multi-region) |
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