00000nam a2200000 a 4500 20251203092032.0 020142293X 004.6 HAL Halsall, Fred Data communications, Computer networks and Open systems 4th ed EnglaNew Delhi Addison-Wesley 1996 xvi, 907p. 20 cm. PB Electronic systems engineering series Computer Science Data Communications Internetworking ENGLISH 004 BOOK _ 88180 C 61660 61660 0 0 0 0 PU PU 1998-10-01 27.70 0 004.6 HAL 88180 1998-10-10 BK