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。
Spanning tree protocol is a very important protocol in switching LAN, especially in a large scale switching LAN.
生成树协议是交换网络中很重要的一个协议，尤其在大规模交换网络中更为重要。
Spanning tree protocol is a very important protocol in switching LAN, especially in a large scale switching LAN.
生成树协议是交换网络中很重要的一个协议，尤其在大规模交换网络中更为重要。
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