XK0-005 · Question #10620
A Linux system is having issues. Given the following outputs: Which of the following best describes this issue?
The correct answer is D. The DNS service is currently not available or the corresponding port is blocked. The ping command shows that the Linux system can reach the DNS server at 192.168.2.2, so the DNS host is not down. The dig and nc commands show that the Linux system cannot connect to the DNS server on port 53, which is the standard port for DNS queries. This means that either…
Question
Options
- AThe DNS host is down.
- BThe name mycomptiahost does not exist in the DNS.
- CThe Linux engineer is using the wrong DNS port.
- DThe DNS service is currently not available or the corresponding port is blocked.
How the community answered
(31 responses)- A3% (1)
- B3% (1)
- C10% (3)
- D84% (26)
Explanation
The ping command shows that the Linux system can reach the DNS server at 192.168.2.2, so the DNS host is not down. The dig and nc commands show that the Linux system cannot connect to the DNS server on port 53, which is the standard port for DNS queries. This means that either the DNS service is not running on the DNS server, or there is a firewall or network device blocking the port 53 traffic. Therefore, the DNS service is currently not available or the corresponding port
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