Difference between Cluster and Non-cluster index?

A clustered index is a special type of index that reorders 
the way records in the table are physically stored. 
Therefore table can have only one clustered index. The leaf 
nodes of a clustered index contain the data pages.
clustered index is physically stored 
a table can have 1 clustered index

A nonclustered index is a special type of index in which 
the logical order of the index does not match the physical 
stored order of the rows on disk. The leaf node of a 
nonclustered index does not consist of the data pages. 
Instead, the leaf nodes contain index rows.
non clustered index is logically stored 
a table can have 249 non clustred index