none
Bus topology is extended via the use of repeaters.
In serial bus, if there are multiple masters, then multiple master decides whether it acquires the bus or not using data pattern. In case where master needs to drive 0, it would drive other wise it would release. Master would always figure out whehter it has acquired the bus or not by checking the bus being equal to 1 when it is not driving. If it is driven as 0, then it would understand that it is occupied by other master. So it would release the bus.
You will be able to get on top of the bus via the ladder towards the back of the bus.
Data bus
I think you go ON a bus cause it implies that you climb onto it via stairs, hence the phrase.
Catch the 529 from Walsall Bus Station
Long!
via bus number 16X every half an hour from the bus stop right outside arrival at stansted. NUMBER 16X goes to GATWICK VIA NORTHAMTONSHIRE
Via rail or Greyhound from Ottawa to New York City via Montreal
The necesary I think there are:taxi,bus,airplane,boat and bus! They each have their own features via from greebid.com
Get a 404 from Coulsdon Library to Caterham on the Hill.