Bridged Backbones
Move packets between networks based on their data link layer addresses
Cheaper (since bridges are cheaper than routers) and easier to install (configure)
- Just one subnet to worry
- Change in one part may effect the whole network
Performs well for small networks
- For large networks broadcast messages (e.g., address request, printer shutting down) can lower performance
Formerly common in the distribution layer
- Declining due to performance problems