This activity is usually performed for network access authorization and authentication, content filtering, or to better utilize network bandwidth through caching.

通常为了进行网络访问授权和身份验证、内容筛选或通过缓存更好地利用网络带宽而进行此活动。

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But it did put the focus on content filtering, a network security technology that observers say has been undervalue d.

但它确实使人们的注意力集中到内容过滤上，这是一项观察家们认为以往被低估了的网络安全技术。

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Content filtering in network security is a new subject. This paper founds a complete content filtering model and implements the content filtering model in WWW proxy of TIS.

内容过滤是网络安全领域的新课题，文章建立了一个完整的内容过滤模型，并在TIS的WWW代理服务中实现了此内容过滤模型。

youdao

What about URL content filtering and network anti-malware?

FORBES: Demystifying Next Gen Firewalls and UTM