TY  - BOOK
AU  - Black,Uyless D.
TI  - Computer networks: Protocols, standards, and interfaces 
SN  - 0-13-175605-2
AV  - TK5105.5 B53 1993
PY  - 1993///
CY  - Englewood cliffs, new jersey
PB  - Prentice Hall
KW  - Redes de computadoras
ER  -