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Exam 010-160 All Questions

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Exam 010-160 topic 1 question 2 discussion

Actual exam question from LPI's 010-160
Question #: 2
Topic #: 1
[All 010-160 Questions]

Reverse DNS assigns hostnames to IP addresses. How is the name of the IP address 198.51.100.165 stored on a DNS server?

  • A. In the A record for 165.100.51.198.ipv4.arpa.
  • B. In the PTR record for 165.100.51.198.in-addr.arpa.
  • C. In the RNAME record for 198-51-100-165.rev.arpa.
  • D. In the ARPA record for 165.100.51.198.rev.
  • E. In the REV record for arpa.in-addr.198.51.100.165.
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Suggested Answer: B 🗳️
by winx at Sept. 13, 2020, 6:58 a.m.

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linvidia
Highly Voted 2 months, 3 weeks ago
Selected Answer: B
The PTR record is used for reverse lookup in DNS: starting from an IP address, the associated domain is obtained.
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winx
Most Recent 2 years, 4 months ago
could anyone explain on this ?I dont know how u get this answer
upvoted 4 times
khaus
2 years, 2 months ago
From Cloudflare.com: A DNS pointer record (PTR for short) provides the domain name associated with an IP address. A DNS PTR record is exactly the opposite of the 'A' record, which provides the IP address associated with a domain name. DNS PTR records are used in reverse DNS lookups.
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