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What does a lower Administrative Distance (AD) indicate?

Less reliable routing

More preferred routing

A lower Administrative Distance (AD) indicates more preferred routing because the value of AD is a metric used by routers to prioritize routing protocols. Each routing protocol has a default AD value that signifies its reliability; lower values are considered more trustworthy. When multiple routing sources provide information about the same destination, the router will always prefer the one with the lowest AD. For instance, a directly connected route has an AD of 0, while a static route has an AD of 1, and common dynamic routing protocols like RIP, OSPF, and EIGRP have higher values. This hierarchy allows the router to effectively determine which route to use based on the reliability of the information. Thus, a lower AD clearly aligns with the concept of being more favored over others when determining the best path for packet forwarding.

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Higher likelihood of delay

More pathways available

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