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.

The correct answer is A. 200303028. In a SOA record, the first numeric field inside the parentheses is the Serial Number, which acts as the version identifier for the zone. In the record 'Rutgers.edu. SOA NS1.Rutgers.edu ipad.college.edu (200302028 3600 3600 604800 2400)', the serial number is 200302028. This…

Footprinting and Reconnaissance

Question

Options

A200303028
B3600
C604800
D2400
E60
F4800

How the community answered

(61 responses)

A
72% (44)
B
2% (1)
C
7% (4)
D
15% (9)
E
3% (2)
F
2% (1)

Explanation

In a SOA record, the first numeric field inside the parentheses is the Serial Number, which acts as the version identifier for the zone. In the record 'Rutgers.edu. SOA NS1.Rutgers.edu ipad.college.edu (200302028 3600 3600 604800 2400)', the serial number is 200302028. This value is commonly formatted as YYYYMMDDNN (year, month, day, revision). Secondary DNS servers compare this number to their cached copy - if the primary's serial is higher, a zone transfer is triggered to sync the zone data. Choice A (200303028) corresponds to this first positional field and is the intended correct answer, despite the slight numeric discrepancy being a typo in the question.

Topics

#DNS#SOA record#serial number#zone versioning

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