support.dell.com Introduction 1-5 For information about enabling, disabling, or configuring input/output (I/O) ports andconnectors, see Chapter 4, “Using the System Setup Program,” in this guide. Fordetailed descriptions and illustrations of each port and connector on the back panel,see Appendix B, “I/O Ports and Connectors,” in this guide. You can connect various external devices, such as a mouse and printer, to the I/Oports and connectors on the computer's back panel. The server’s basic input/outputsystem (BIOS) detects the presence of most external devices when you boot orreboot the system. When connecting external devices to the computer, follow theseguidelines: Check the documentation that accompanied the device for specific installationand configuration instructions.For example, most devices must be connected to a particular I/O port or connec-tor to operate properly. Also, external devices like a mouse or printer usuallypowerreceptacleserial port 2connectorparallel portconnectorserial port 1connectormouseconnectorkeyboardconnectorUSBconnectorsvideoconnectorNIC connectorexpansionslots (6)