Shared versus switched media
Nodes share a single communication
medium (e.g. Ethernet). Every message
Communication is point-to-point through
dedicated lines. A message goes only
- Inexpensive (no switches);
- Short response time (no switch delay);
- Broadcasting or multicasting easy.
Needs arbitration to handle collisions.
centralized or distributed.
Needs switches to establish direct
- Higher aggregate bandwidth
(multiple pairs of nodes can