bei Fragen: E-mail an: abed@kom.tu-darmstadt.de
| Netze | Ethernet |  |
In spite of the advantage of the extensibility of a Bus topology, there are still disadvantages and problems. Which problems have to be faced in a bus-topology ? We provide a set of different answers and use the same animation to explain why the answers are correct or wrong. Is there any correct answer in the following choices? a) The protocol is complex because messages cannot be sent to a specific computer. They can only be sent to several computers at once. b) In order to send several messages simultaneously, the bandwidth should be raised. c) The delay is bigger (the ways of the messages on the bus are longer). d) If several computers send messages at the same time, the bus become congested and we may have collisions.
Reminder: principle of Bus-topology in comparison to point to point connection
Answer: Indeed this is the main disadvantage as well as the biggest problem in a bus topology. Since all computer send data over the same channel, collisions may occur. How can the collision problem be solved in Ethernet?