000 00342nam a2200145Ia 4500
008 211209s2021 xx 000 0 und d
020 _a9789352866601
041 _aeng
082 _a005.8 STA
100 _aSTALLINGS, WILLIAM
245 _aNETWORK SECURITY ESSENTIALS
250 _a6TH EDN ed.
260 _bPEARSON
_c2021
300 _a461
999 _c94295
_d94295