000 00340nam a2200133 4500
020 _a1-57870-160-0
050 _aTK5105.59 C57
100 _aCISCO SYSTEMS
245 _aCISCO IOS 12.0 NETWORK SECURITY
260 _aCISCO PRESS1999
650 _aREDES LAN
008 000000 A 0000000000 00
942 _cBK
999 _c1776
_d1776