220-1101 · Question #866
A technician needs to update a web server's IPv4 address in a DNS server. Which of the following records should the technician update?
The correct answer is D. A. To update a web server's IPv4 address in DNS, the technician must modify the "A" record associated with that server.
Question
A technician needs to update a web server's IPv4 address in a DNS server. Which of the following records should the technician update?
Options
- AAAAA
- BMX
- CCNAME
- DA
How the community answered
(63 responses)- A3% (2)
- B2% (1)
- C2% (1)
- D94% (59)
Why each option
To update a web server's IPv4 address in DNS, the technician must modify the "A" record associated with that server.
An "AAAA" record maps a hostname to an IPv6 address, not an IPv4 address.
An "MX" record, or Mail Exchanger record, specifies the mail servers responsible for accepting email for a domain.
A "CNAME" record, or Canonical Name record, creates an alias from one domain name to another, not directly an IP address.
An "A" record, or Address record, maps a hostname to an IPv4 address. When a web server's IPv4 address changes, this is the specific DNS record that needs to be updated to ensure the hostname resolves to the correct new IP.
Concept tested: DNS record types for IPv4 resolution
Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/dnscmd-record-add-a
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