Dell Latitude D420 - Manual (Page 22)

20 Media Base Setup Guide
Ports and Connectors
Network connector RJ-45 port for 10/100/1000 Mbits/second
BaseTX Bus Master Ethernet
USB three 4-pin USB-2.0 compliant connectors
Powered USB one 9-pin USB-2.0 compliant connector
Parallel 25-hole connector; unidirectional,
bidirectional, or ECP
Video 15-hole connector
DVI connector 24-hole connector
Serial 9-pin connector; 16550C-compatible UART
with 16-byte buffer
Audio headphone/speaker (line-out) mini connector
Docking 280-pin connector