Segmentation in OS means variable size partition of main memory.
These partitions are not predefined.
So, Segment table is there to define the starting address of the table → (Base Address) and
limit is the size of the segment.
If base address is 1900 and limit is 400 this means:
cell no. Address
1→ 1900
2→ 1901
3→ 1902
. .
. .
. .
400→ 2299 (Segment end)