00588nam a2200193   4500001001400000003000700014005001700021008004100038020001500079040000800094100002600102245009100128250001200219260005500231300003700286500001900323650003000342650002200372vtls000012094KUKTEM20251117142353.0060606t2004    xxu    gr    |0 1 0|eng |  a047196820X  aUMP1 aHeld, Gilbert,d1943-00aUnderstanding data communications :b from fundamentals to networking /c Gilbert Held  a2nd ed.  aChichester ; New York:b John Wiley & Sons,c 1996  axx, 728 p.:b ill., maps; 25 cm.  aIncludes index00aData transmission systems00aComputer networks