000 00312nam a22001337a 4500
008 180214b xxu||||| |||| 00| 0 eng d
020 _a9780619015299
041 _aeng
080 _a004
100 _a35
101 _ashk
245 _adata communications and computer network
_ccurt.m.w
942 _2udc
_cBK
999 _c42500
_d42500