With　the　evolution　and　popularity　of　computer　networks,　a　tremendous　amount　of　devices　are　increasingly　being　added　to　the　global　internet　connectivity.　Additionally,　more　sophisticated　tools,　methodologies,　and　techniques　are　being　used　to　enhance　global　internet　connectivity.　It　is　also　worth　mentioning　that　individuals,　enterprises,　and　corporate　organizations　are　quickly　appreciating　the　need　for　computer　networking.　However,　the　popularity　of　computer　and　mobile　networking　brings　various　drawbacks　mostly　associated　with　security　and　data　breaches.　Each　day,　cyber-related　criminals　explore　and　devise　complicated　means　of　infiltrating　and　exploiting　individual　and　corporate　networks＇　security.　This　means　cyber　or　network　forensic　investigators　must　be　equipped　with　the　necessary　mechanisms　of　identifying　the　nature　of　security　vulnerabilities　and　the　ability　to　identify　and　apprehend　the　respective　cyber-related　offenders　correctly.　Therefore,　this　research＇s　primary　focus　is　to　provide　a　comprehensive　analysis　of　the　concept　of　network　forensic　investigation　and　describing　the　methodologies　and　tools　employed　in　network　forensic　investigations　by　emphasizing　on　the　study　and　analysis　of　the　OSCAR　methodology.　Finally,　this　research　provides　an　evaluative　analysis　of　the　relevant　literature　review　in　a　network　forensics　investigation.