Thus, NGN security issue is a topic that is worthy of researching deeply.
因此，NGN的安全问题是一个值得深入研究的课题。
Clustered media server is a kind of key equipment in NGN multimedia service platform. Security issue is very important in NGN.
媒体服务器是NGN多媒体业务平台中的关键设备，NGN的安全至关重要。
Clustered media server is a kind of key equipment in NGN multimedia service platform. Security issue is very important in NGN.
媒体服务器是NGN多媒体业务平台中的关键设备，NGN的安全至关重要。
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