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[单选题]
MME网元设备下面哪条命令是备份协议栈的?()
A.BACKUP:OUTPUTPATH=/home,FILENAME=back,SETID=1400000;
B.BACKUP:OUTPUTPATH=/home,FILENAME=back,SETID=1400001;
C.BACKUP:OUTPUTPATH=/home,FILENAME=back,SETID=2;
D.BACKUP:OUTPUTPATH=/home,FILENAME=back,SETID=1025;
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