@book{258,
	author = {Forouzan, Behrouz A. and Fegan, Sophia Chung.},
	title = {Data communications and networking /},
	publisher = {Tata McGraw-Hill publishing,},
	year = {c2007 [Reprinted 2010].},
	series = {McGraw-Hill Forouzan networking series},
	address = {New Delhi :},
	edition = {4th ed.}
}