这个新的链将拒绝所有超出指定限度的信息包。
This new chain will reject all packets that exceed our specified limit.
这个字段用于指定所有缓存机制在整个请求/响应链中必须服从的指令。
This field is used to specify directives that must be obeyed by all caching mechanisms along the request/response chain.
根据服务器端处理的不同通信类型,我们可以指定不同的管道链。
Depending on the type of communication the server is doing, a different chain of channels can be specified.
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