Original subtitles

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However if we go back to the previous example

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note that in this case OSPF and RIP are advertising

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the same route network 10.0.0.0/8 is advertised

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by both New York and San Jose and thus administrative distance is chosen

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because the same route can’t be put twice into the routing table.

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The router has to choose the best route

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and in this case, administrative distance is used

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as the tie breaker between OSPF and RIP.

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So in summary administrative distance is only used

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if multiple routing protocols are trying to put the same route

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into the Routing Information Base or RIP also called the routing table

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In this example once again the 3 routes

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are seen as 3 separate and distinct routes.

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All 3 routes are put into the routing table

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and the routing decision is based on longest match or best match.

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So network 10.1.1.0/27 has the longest match

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so it’s deemed to be the best route.

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Traffic is forwarded to router 1

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even though RIP has a higher administrative distance when compared to OSPF.