防火墙通常分为内外网和DMZ三个区域，按照受保护程度，从高到低正确的排列次序为（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30130' and id < 2438257 and id<>'2438257' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30130' and id > 2438257 and id<>'2438257' order by id asc limit 5