00303nam a2200109 a 450000500170000002000150001708200160003210000200004824500430006826000570011130000250016820251203110207.0  a053868870X  a004.62bBUS  aBush, Patrick J  aIntroduction to TCP/IP internetworking  aNew YorkbSouth-Western Educational publishingc1999  axii,352p.c22cm. PB.