Computer Networking Study Notes: Chapter 1.2
A closer look at Internet structure
- Network edge:
- hosts: clients and servers
- servers often in data centers
- Access networks, physical media:
- wired, wireless communication links
- Network core:
- interconnected routers
- network of networks
Access networks and physical media
Q: How to connect end systems to edge router
* residential access nets
* institutional access networks (school, company)
* mobile access networks (WiFi, 4G/5G)
Access networks: cable-based access
- frequency division multiplexing (FDM):
- different channels transmitted in different frequency bands