Switch#show version
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6K2L2Q4-M), Version 12.1(20)EA1, RELEASE SOFTWAR
E (fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Wed 04-Feb-04 23:40 by yenanh
Image text-base: 0x80010000, data-base: 0x806C8000

ROM: Bootstrap program is C2950 boot loader

Switch uptime is 2 hours, 28 minutes
System returned to ROM by power-on
System image file is "flash:/c2950-i6k2l2q4-mz.121-20.EA1.bin"

This product contains cryptographic features and is subject to 
United States and local country laws governing import, export, 
transfer and use. Delivery of Cisco cryptographic products does 
not imply third-party authority to import, export, distribute 
or use encryption.
Importers, exporters, distributors and users are responsible 
for compliance with U.S. and local country laws. By using this 
product you agree to comply with applicable laws and regulations. 
If you are unable to comply with U.S. and local laws, return this 
product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

cisco WS-C2950G-12-EI (RC32300) processor (revision E0) with 19672K bytes of mem
ory.
Processor board ID FHK0643Y1AU
Last reset from system-reset
Running Enhanced Image
12 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:0B:46:C8:BE:00
Motherboard assembly number: 73-7410-05
Power supply part number: 34-0965-01
Motherboard serial number: FOC064302QS
Power supply serial number: PHI063705F2
Model revision number: E0
Motherboard revision number: A0
Model number: WS-C2950G-12-EI
System serial number: FHK0643Y1AU
Configuration register is 0xF