There is no Australian state which shares a border with all other states. No state except for Victoria shares a land border with Tasmania. South Australia shares a border with all mainland states and the Northern Territory.
South Australia
um NONE
Australia is an island continent separated from New Zealand by the Tasman Sea. Neither country shares a border with any other.
The Australian state with the longest border is Western Australia, which shares extensive borders with the Northern Territory and South Australia. Western Australia's border measures approximately 3,400 kilometers. Australia's total land border length is around 8,000 kilometers, so Western Australia's border represents about 42.5% of the country's total border length.
The question does not make sense. All of the states of Australia share a border with another state. Even Tasmania, the island state, shares an actual land border as well as a water border with another state.
Venezuala shares a border with Brazil.
South Australia borders the most states and territories in Australia. South Australia shares borders with Western Australia, the Northern Territory, Queensland, New South Wales and Victoria.
Australia shares no land border with any other country. It is surrounded entirely by oceans and seas.
Portugal shares Spain's western border.
Israel shares a border with Egypt which is in Africa.
No it does not. It shares a border with Israel and Syria