00462nam a2200157Ia 4500008004100000020001300041082001400054100002300068245004500091250000700136260004100143300003000184500001900214600002100233650005000254240925s9999    xx            000 0 und d  a70636559  a005.8 CAR  aCarr ,Houston   H. 0aData Communications and Network Security  aNA  aNew Delhi:bTata McGraw Hillc,2007.  axxix,907p.bNAfPhotocopy  aIncludes Index  aComputer Science  aComputer science, information & general works