# L

## 延迟

数据在网络中传输时的时延。延迟通常以毫秒（ms）为单位进行测量，可能会影响实时应用程序的性能，例如在线游戏和视频会议。

## LOA

授权书（Letter of Authorization，LOA）是一种正式文档，由互联网资源（如 IP 地址段或自治系统（AS）号码）的持有者向另一方（通常是上游运营商或数据中心运营商）授权，允许其代表持有者公告、路由或以其他方式使用该资源。在将自有 IP 段引入新运营商（BYOIP），或申请路由公告和交叉连接时，通常需要提交 LOA。


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