@book{784, author = {Duck, Michael. and Read, Richard,}, title = {Data communications and computer networks :}, publisher = {Pearson/Prentice Hall,}, year = {2003.}, address = {Harlow, England ;}, edition = {2nd ed.}, url = {https://uowd.box.com/s/pqsfn03gq5c5kaz4nrexs4slbvsq7apx} }