312-50V13 · Question #84
One of your team members has asked you to analyze the following SOA record. What is the version? Rutgers.edu.SOA NS1.Rutgers.edu ipad.college.edu (200302028 3600 3600 604800 2400.) (Choose four.)
The correct answer is A. 200303028. In a DNS SOA record, the serial number (version) is the first numeric value following the primary master and responsible person fields, typically formatted as a date.
Question
Options
- A200303028
- B3600
- C604800
- D2400
- E60
- F4800
How the community answered
(32 responses)- A94% (30)
- B3% (1)
- C3% (1)
Why each option
In a DNS SOA record, the serial number (version) is the first numeric value following the primary master and responsible person fields, typically formatted as a date.
In a Start of Authority (SOA) record, the serial number is the first numeric value enclosed within the parentheses. This number represents the revision count of the zone file and is often formatted as a date (YYYYMMDD) followed by a revision count for that day.
'3600' is the refresh interval, indicating how often secondary name servers should query the primary for changes.
'604800' is the expire limit, specifying how long a secondary server will continue to attempt to refresh the zone before considering the data too old to be authoritative.
'2400' is the minimum TTL (Time To Live) for negative responses, which specifies how long a resolver should cache a negative answer.
The number '60' does not appear in the provided SOA record's numeric sequence.
The number '4800' does not appear in the provided SOA record's numeric sequence.
Concept tested: DNS SOA record components (serial number)
Source: https://www.ietf.org/rfc/rfc1035.txt
Topics
Community Discussion
No community discussion yet for this question.