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問答題
【簡(jiǎn)答題】what is administrative distance.
答案：
An administrative distance is a̳...
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問答題
【簡(jiǎn)答題】In multicast network how to select DR？ and what is the order？
答案：
DR selection is using hello me...
問答題
【簡(jiǎn)答題】What field in IP packet is prevent the packet from a route to router forever？
答案：
TTL （time to live）.
