Multiple choice

The following line of code is present in the routing table: O 10.16.1.0/27 [110/129] via 192.168.1.5, 00:00:05, Serial0/0/1 What does the number 129 indicate in this output?

  1. The cost for this link has a value of 129.

  2. The clock rate on this serial interface is set to 129,000.

  3. The next-hop router is 129 hops away from this router.

  4. This route has been updated 129 times in this routing table.
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A Correct answer
Explanation

The routing table entry shows O (OSPF) [110/129]. The first number (110) is OSPF's administrative distance. The second number (129) is the route metric/cost, calculated from bandwidth and delay (option A). Option B incorrectly interprets this as clock rate. Option C incorrectly states this is hop count (OSPF uses cost, not hops). Option D incorrectly says this is update count. The 129 is the composite metric for this OSPF route.

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