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EC-Council

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.

Submitted by naveen.iyer· Mar 6, 2026Footprinting and Reconnaissance

Question

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.)

Options

  • A200303028
  • B3600
  • C604800
  • D2400
  • E60
  • F4800

How the community answered

(32 responses)
  • A
    94% (30)
  • B
    3% (1)
  • C
    3% (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.

A200303028Correct

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.

B3600

'3600' is the refresh interval, indicating how often secondary name servers should query the primary for changes.

C604800

'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.

D2400

'2400' is the minimum TTL (Time To Live) for negative responses, which specifies how long a resolver should cache a negative answer.

E60

The number '60' does not appear in the provided SOA record's numeric sequence.

F4800

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

#DNS records#SOA record#zone transfer#serial number

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