Areas Divide network into areas k areas can have nested sub-areas Hierarchically address nodes in a network Sequentially number top-level areas k Sub-areas of area are labeled relative to that area k nodes are numbered relative to the smallest containing area 2021/1/31Areas  Divide network into areas  Areas can have nested sub-areas  Hierarchically address nodes in a network  Sequentially number top-level areas  Sub-areas of area are labeled relative to that area  Nodes are numbered relative to the smallest containing area 2021/1/31 5