00000cam a22000003a 4500 UP-1685523046126318096 Buklod 20170410112546.0 m |o d | cr ||||||||||| 170410s1999 xx d r |||| u| 053495054x (iLib)UPMNL-00015383045 UCASM002229 Php641.00 CASM rda eng TK5105 S53 1999 Shay, William A. Understanding data communications and networks William A. Shay. Understanding data communications & networks 2nd ed. Pacific Grove, Calif. PWS c1999. xx, 711 p. ill. 24 cm. text rdacontent unmediatedt rdamedia volume rdacarrier Data transmission systems. Computer networks. UPMNL CASM TK5105 .S53 1999 Book