Which of the following should be adjusted to address the issue?

After the A record of a public website was updated, some visitors were unable to access the website.

Which of the following should be adjusted to address the issue?
A . TTL
B. MX
C. TXT
D. SOA

Answer: A

Explanation:

TTL (Time To Live) should be adjusted to address the issue of some visitors being unable to access the website after the A record was updated. TTL is a value that specifies how long a DNS record should be cached by DNS servers and clients before it expires and needs to be refreshed. If the TTL is too high, some DNS servers and clients may still use the old A record that points to the previous IP address of the website, resulting in connection failures. By lowering the TTL, the DNS servers and clients will update their cache more frequently and use the new A record that points to the current IP address of the website.

Reference: https://www.cloudflare.com/learning/dns/dns-records/dns-ttl/

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