CDN的实现需要依赖多种网络技术的支持，其中主要的有缓存技术、动态内容分发与复制技术、负载均衡技术等。
Implementation of CDN depends on various network technologies, of which technology such as caching, dynamical content distribution and duplicating, load-balancing and so on is primary.
推拉结合的内容分发方案由于存在较多冗余数据和动态适应性较差等缺陷，一般只能适用于直播系统。
The push-pull combination content distribution strategy is general applied to live systems because of its limitation such as redundant packets, poor dynamic adaptability and so on.
推拉结合的内容分发方案由于存在较多冗余数据和动态适应性较差等缺陷，一般只能适用于直播系统。
The push-pull combination content distribution strategy is general applied to live systems because of its limitation such as redundant packets, poor dynamic adaptability and so on.
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