The default sequence might very well be arbitrary: the first item might be about routing protocol while the second one might be about LAN switching, etc.
默认的考题顺序通常是随机的：第一项考题可能是关于路由协议的而第二项考题有可能就是LAN交换的等。
Think about small mistakes such as typos in configuration lines, missing a loopback prefix in your routing protocol, or missing a small requirement in an exam item.
比如在配置中拼错单词或在你的路由协议配置遗漏了还回配置的前缀，以及遗漏细小的实验项目要求等。
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