Data Network Routing Issues
Unreliable routers, links: Why ?
- Cheap-n-dirty components, little hardware redundancy or backup, heterogeneity in equipment
Complex load structure:
- Internet aggregate traffic is possibly self-similar or is not easy to deal with mathematically.
Large number of organizations with autonomous domains:
- Can’t implement global changes quickly
Sparsely interconnected network:
- Few alternative paths
- Unlike a clique of toll-switches
+ve: No resource reservation for best effort => flexible