Decentralized Routing
Open Shortest Path First (OSPF) is a commonly used dynamic routing protocol that uses the number of computers in a route as well as network traffic and error rates to select the best route.
Drawbacks of dynamic routing:
- requires more processing by each computer in the network than centralized routing or static routing (computing resources are devoted to adjusting routing tables rather than sending
messages, which can slow down
the network.
Also the adjusting of the routing tables wastes resources from sending messages.)
- the transmission of status information (e.g., how busy each computer is) “wastes” network capacity (some protocols transmit the status information every minute) ==>reduced network performance