000 00256nam a2200109Ia 4500
008 231002s9999 xx 000 0 und d
020 _a9781111312527
090 _aR 004.6
090 _bTOM
100 1 _aGregory Tomsho
245 0 0 _aGuide to Networking Essentials
999 _c489
_d489