How do I get my network card's model number without opening my computer box?
Linux: use the commands lspci, lspci -v, lshw, lshw -a
More detailed informations than the device manager can be provided by some as colled "hardware info" programs.
Une i linke in particular is "Pc Wizard" http://www.cpuid.com/softwares/pc-wizard.html
Is made from the same producers of the famous Cpu-z(cpu info program)