Weird ping returns

["Burns, Bryan" <Bryan_Burns@xxxxxxxxxxxx>]

What would cause a ping request to return a different address as shown
below?  And are there scenarios where a timeout every once and awhile
can be considered normal?  (192.168.1.102 is a wireless printer and
192.168.0.239 is a wireless handheld computer/scanner).
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

P:\>ping 192.168.1.102

Pinging 192.168.1.102 with 32 bytes of data:

Request timed out.
Request timed out.
Reply from 192.168.0.239: bytes=32 time=774ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255

Ping statistics for 192.168.1.102:
    Packets: Sent = 4, Received = 2, Lost = 2 (50% loss
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 774ms, Average = 389ms

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P:\>ping 192.168.1.102

Pinging 192.168.1.102 with 32 bytes of data:

Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255

Ping statistics for 192.168.1.102:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 4ms, Average = 4ms

P:\>ping 192.168.1.102

Pinging 192.168.1.102 with 32 bytes of data:

Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255

Ping statistics for 192.168.1.102:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 4ms, Average = 4ms

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P:\>ping 192.168.1.102

Pinging 192.168.1.102 with 32 bytes of data:

Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255
Request timed out.
Reply from 192.168.0.239: bytes=32 time=4ms TTL=255

Ping statistics for 192.168.1.102:
    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 4ms, Average = 4ms

______________________________________________

P:\>ping 192.168.1.102

Pinging 192.168.1.102 with 32 bytes of data:

Reply from 192.168.0.239: bytes=32 time=56ms TTL=255
Reply from 192.168.0.239: bytes=32 time=59ms TTL=255
Reply from 192.168.0.239: bytes=32 time=62ms TTL=255
Reply from 192.168.0.239: bytes=32 time=50ms TTL=255

Ping statistics for 192.168.1.102:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)
Approximate round trip times in milli-seconds:
    Minimum = 50ms, Maximum = 62ms, Average = 56ms