000 00249nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _asingh(ajit kumar)
245 0 _aCOMPUTER NETWORK
250 _aI
260 _bFIREWALL MEDIA
942 _2ddc
_cBTECH
999 _c4779
_d4779