Just out of interest, did you try opening your text book or typing define: independant assortment into google before posting here?
Independant assortment: The principle that during meiosis the two copies of each gene are distributed to the germ cells independently of the distribution of other genes.
Random segregation: Each pair of a homologous chromsome is sorted independently durring the 2nd division in meosis to each other pair.
So in a nutshell: independant assortment- sorting of the genes, random segregation- sorting of chromosomes.
On a broad scale they are the same thing in that genes are segements of the coiled strands of DNA which make up chromosomes. So unless you were specifically tracking the assortment and recombination of genes to form a specific characteristics you would just say random segregation.