00549pam a2200157 a 4500 0 0 0 0 RIU RIU 2012-05-02 Purchased: Old Book Shop 2 495.00 0 004.6 HAL 1845 2012-05-02 00:00:00 1 2012-05-02 BK 676 676 0201565064 (Hb) 004.6 HAL Halsall, Fred Data communications, computer networks and open systems England Addison-Wesley Publishing 1992 xi, 772 p. : ill. ; 24 cm. Includes index. Computer networks Data transmission systems Computer network protocols Data communication Transport protocol Internetworking WAN LAN FC BK