bei Fragen: E-mail an: abed@kom.tu-darmstadt.de
| Network | 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 messages are not sent explicitely to a target receiver. They are broadcasted over the bus. As part of the Ethernet-Protocol the messages contains header information, which explicitely indicates the receiver machine.