segment is the data file space. The Chinese name is segment, which refers to the general name of the data file space occupied, or the collection of space used by database objects; the segment can include table segments, index segments, Rollback segment, temporary segment, cache segment, etc.
segment classification
1) In the database, a segment refers to a part containing one or more areas. Each area is composed of units called areas. One or more Segments form a table space.
2) In an image, a segment is defined as the shortest possible path between two points. In a bitmap, the smallest segment is the set of all pixels closest to the shortest path between two points. In vector graphics, you create a segment by specifying two endpoints and then constructing a straight line between them. Two or more segments placed end-to-end form a polyline.
3) In a communication system, a segment is a part of the network. Within a network segment, data can flow freely between any two points without going through switches, routers, bridges, or hubs. The size of a segment can be defined as the number of workstations within it or the network traffic it carries. A TCP TPDU (Transfer Protocol Data Unit) is called a segment, consisting of a 20bytes header file, with a maximum total length of 65535bytes. When a segment is larger than the network maximum unit (MTU), the segment is broken into smaller pieces by the network layer.
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