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In the field of Computer Science, a node pertains to the basic unit of a data structure. Nodes contain data and are linked to other nodes. Such connections are usually done through what are called, pointers. 

The arrangement of nodes is usually done through “Tree Structures”. Information within a single data structure is represented by a node. These may hold a value or condition and may even serve another data structure altogether. 

Within the tree structure, the highest point is called a “Root Node”. To determine this, the height of a node is taken into consideration through the total number of edges on the path from the node to the farthest “Leaf Node”.

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