@book{20648,
	author = {Pal, Ajit},
	title = {Data Communication:},
	publisher = {Indian Insitiute of Technology},
	address = {Kharagpur},
	url = {http://video.snu.edu.in/index.php?id=1147&cat=Computer Science and  Engineering&course=Data Communication&url=Phase1_Video/106105082/lec08.mp4}
}