えーっと
Catalyst2950が届きました。
正確な型番はCisco Catalyst 2950T-24というと思います。
私の機材の5台目と6台目のスイッチになります。
スイッチを買うときはルータほどIOSを気にしないのですが、一応バージョンを見てみました。

Switch#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6K2L2Q4-M), Version 12.1(22)EA14, RELEASE SOFTWARE (fc1)
Technical Support: ttp://www.cisco.com/techsupport
Copyright (c) 1986-2010 by cisco Systems, Inc.
Compiled Tue 26-Oct-10 10:35 by nburra
Image text-base: 0x80010000, data-base: 0x80680000

ROM: Bootstrap program is C2950 boot loader

Switch uptime is 2 minutes
System returned to ROM by power-on
System image file is "flash:/c2950-i6k2l2q4-mz.121-22.EA14.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:
ttp://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-C2950T-24 (RC32300) processor (revision K0) with 19911K bytes of memory.
Processor board ID FOC0743Z0RJ
Last reset from system-reset
Running Enhanced Image
24 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: 00:0E:38:54:BE:00
Motherboard assembly number:
Power supply part number:
Motherboard serial number:
Power supply serial number:
Model revision number: K0
Motherboard revision number: A0
Model number: WS-C2950T-24
System serial number:
Configuration register is 0xF