@book{1162,
	author = {Stallings, William},
	title = {Data and Computer Communications/},
	publisher = {Prentice hall,},
	year = {2004.},
	address = {New Delhi:},
	edition = {8th ed.},
	url = {http://www.portcity.edu.bd/ELibrary/CSE/Dataandcomputercommunications.pdf}
}