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Exam 102-500 All Questions

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Exam 102-500 topic 1 question 8 discussion

Actual exam question from LPI's 102-500
Question #: 8
Topic #: 1
[All 102-500 Questions]

On a Linux workstation, the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?

  • A. The local routing information may be corrupted and must be re-validated using a routing protocol.
  • B. One of the routers in the routing table is not available which causes the automatic router failure detection mechanism (ARF-D) to wait for a timeout.
  • C. There may accidentally be more than one default router in which case a default router election has to be done on the network in order to choose one router as the default.
  • D. The Linux Kernel Routing Daemon (LKRD) is not running and should be started using its init script or systemd unit.
  • E. DNS resolution may not be working as route by default tries to resolve names of routers and destinations and may run into a timeout.
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Suggested Answer: E 🗳️

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ilputto
Highly Voted 2 years ago
you may have a DNS resolution issue causing the slowdown
upvoted 7 times
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CuriousLinuxCat
Highly Voted 1 year, 4 months ago
"The typical reason is that route tries to map the IP addresses in the table into their DNS names - and that can be quite slow because of the vagaries of the DNS system and your network."
upvoted 6 times
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il_biondo
Most Recent 5 days, 3 hours ago
Correct: E "By default, this can be as long as 30 seconds! That means if a nameserver is not available, it will take a while before it tries the next one. And typically it won’t remind that this nameserver is down, so other DNS requests may have to experience the timeout as well."
upvoted 3 times
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vsudo_ganovo2417
1 year ago
I see this article said about DNS:
upvoted 1 times
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PERjham
1 year, 11 months ago
To bypass name resolution (that's default) you have to use "-n" options. Correct Answers D.
upvoted 1 times
PERjham
1 year, 11 months ago
Sorry E.
upvoted 3 times
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Gotcha
2 years, 1 month ago
I think the correct is B. But I'm not sure.
upvoted 1 times
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Erwinator
2 years, 2 months ago
This doesn't seem correct, routing tables use ip instead of dns?
upvoted 1 times
Erwinator
2 years, 2 months ago
Ah or it does a resolve name from ip?
upvoted 1 times
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C (25%)
B (20%)
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