RHEL5 Installation Guide - Chapter 3. System Specifications List

hard drive(s) : type, label, size; e.g. IDE hda=40 GB
partitions : map of partitions and mount points; e.g. /dev/hda1=/home, /dev/hda2=/ (fill this in once you know where they will reside)
memory : amount of RAM installed on your system; e.g. 512 MB, 1 GB
CD-ROM : interface type; e.g. SCSI, IDE (ATAPI)
SCSI adapter : if present, make and model number; e.g. BusLogic SCSI Adapter, Adaptec 2940UW
network card : if present, make and model number; e.g. Tulip, 3COM 3C590
mouse : type, protocol, and number of buttons; e.g. generic 3 button PS/2 mouse, MouseMan 2 button serial mouse
monitor : make, model, and manufacturer specifications; e.g. Optiquest Q53, ViewSonic G773
video card : make, model number and size of VRAM; e.g. Creative Labs Graphics Blaster 3D, 8MB
sound card : make, chipset and model number; e.g. S3 SonicVibes, Sound Blaster 32/64 AWE
IP, DHCP, and BOOTP addresses
netmask
gateway IP address
one or more name server IP addresses (DNS)
domain name : the name given to your organization; e.g. example.com
hostname : the name of your computer; your personal choice of names; e.g. cookie, southpark

If any of these networking requirements or terms are unfamiliar to you, contact your network administrator for assistance.