Cognitive Radio (CR)has been drawing huge attention due to its capability to achieve spectrumoptimisation. Limited availability of spectrum and inefficiency in spectrum usage are guiding the wireless technology towards a new communication paradigm to exploit the existing wireless spectrum opportunistically. It enables sharing ofspectrum amongst a Primary User (PU) which is licensed user and a Secondary User (SU) which is not licensed user. Later is normally gypsy user. The Dynamic Spectrum Access (DSA) used by CR is a new technique which allows sharing of spectrum in such a manner that SUs can access the spectrum holes (voids or temporarily unused part of spectrum) in the licensed spectrum bands of PUs. This work is aimed at generatingtheinterest withinstudent community to undertake research in field of CR which is both challenging and extremely useful.