Hello, I have Windows 7 and I have very strange thing with my network. Some time I was connected through wireless router and my IP was 192.168.2.103, router's IP was 192.168.2.1 and some other IP was 192.168.2.100. The last I get from page "active DHCP clients" of web interface of the router and from "wireless clients" I may to see that 192.168.2.100 not (!) belong to my MAC address. Router build by EDimax.
So after that I disabled wireless function of the router and restarted it. In this time I had not ping to 192.168.2.1. Also I had not any other connection, not wireless nor cable, but (!) I still had ping to 192.168.2.100 and I not understand what this voodoo is...

C:\Users\Andrey>ping 192.168.2.100

Pinging 192.168.2.100 with 32 bytes of data:
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.2.100:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

This is what I had:

C:\Users\Andrey>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : Andrey-PC
Primary Dns Suffix  . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection 3:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix  . :
Description . . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter #2
Physical Address. . . . . . . . . : 06-1D-7D-40-61-EB
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix  . :
Description . . . . . . . . . . . : Gigabyte GN-WS50G (mini) PCI-E WLAN Card
Physical Address. . . . . . . . . : 00-1D-7D-40-61-EB
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix  . :
Description . . . . . . . . . . . : Marvell Yukon 88E8055 PCI-E Gigabit Ethernet Controller
Physical Address. . . . . . . . . : 00-1B-24-B6-09-91
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

C:\Users\Andrey>arp -a -v

Interface: 127.0.0.1 --- 0x1
Internet Address      Physical Address      Type
224.0.0.22                                  static
239.255.255.250                             static

Interface: 0.0.0.0 --- 0xffffffff
Internet Address      Physical Address      Type
192.168.2.1           00-0e-2e-d2-8c-af     invalid
192.168.2.255         ff-ff-ff-ff-ff-ff     static
224.0.0.22            01-00-5e-00-00-16     static
224.0.0.252           01-00-5e-00-00-fc     static
239.255.255.250       01-00-5e-7f-ff-fa     static
255.255.255.255       ff-ff-ff-ff-ff-ff     static

Interface: 0.0.0.0 --- 0xffffffff
Internet Address      Physical Address      Type
192.168.2.1           00-0e-2e-ff-f1-f6     dynamic
192.168.2.101         00-27-19-bc-8b-9c     dynamic
192.168.2.102         00-16-e6-6c-ae-d4     dynamic
192.168.2.255         ff-ff-ff-ff-ff-ff     static
224.0.0.22            01-00-5e-00-00-16     static
224.0.0.252           01-00-5e-00-00-fc     static
239.255.255.250       01-00-5e-7f-ff-fa     static
255.255.255.255       ff-ff-ff-ff-ff-ff     static

Interface: 0.0.0.0 --- 0xffffffff
Internet Address      Physical Address      Type
224.0.0.22            01-00-5e-00-00-16     static
255.255.255.255       ff-ff-ff-ff-ff-ff     static

C:\Users\Andrey>route print
===========================================================================
Interface List
14...06 1d 7d 40 61 eb ......Microsoft Virtual WiFi Miniport Adapter #2
13...00 1d 7d 40 61 eb ......Gigabyte GN-WS50G (mini) PCI-E WLAN Card
11...00 1b 24 b6 09 91 ......Marvell Yukon 88E8055 PCI-E Gigabit Ethernet Controller
1...........................Software Loopback Interface 1
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
    127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
    127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
    224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
===========================================================================
Persistent Routes:
None

IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination      Gateway
1    306 ::1/128                  On-link
1    306 ff00::/8                 On-link
===========================================================================
Persistent Routes:
None

Only after reboot I lost ping to there:

C:\Users\Andrey>ping 192.168.2.100

Pinging 192.168.2.100 with 32 bytes of data:
PING: transmit failed. General failure.
PING: transmit failed. General failure.
PING: transmit failed. General failure.
PING: transmit failed. General failure.

Ping statistics for 192.168.2.100:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

So what this mysterious cache is?
Thank you for ahead.