Ping à valeur logique (Batch)

C:> aa www.google.com 
ok 

C:> aa www.googlexxx.com 
not ok 

C:> type aa.bat 
@ echo off 
ping %1 -n 2 > NUL 
if %errorlevel% EQU 0 ( 
        echo ok 
) else ( 
        echo not ok 
) 

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