000 00264nam a2200109Ia 4500
008 200701s2009 xx 000 0 eng d
100 _aSTALLINGS WILLAM
245 0 _aNetwork security essentials
260 _bPEARSON EDUCATION
300 _a409
942 _2ddc
_cGE
_02
999 _c4113
_d4113