Код:

@echo off
for /f "usebackq delims=" %%i in ("example.txt") do (
call set $%%random%%=%%i
)
for /f "tokens=2 delims==" %%i in ('set $') do (
ping "%%i"
exit /b
)
или
Код:

@echo off
for /f "usebackq delims=" %%i in ("example.txt") do (
call set $%%random%%=%%i
)
for /f "delims==" %%i in ('set $') do (
call ping "%%%%i%%"
exit /b
)
.