Identify DNS attack type

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Hi All :)

I am currently learning how to use wireshark, and as part of an exercise relating to Attacks, I was asked to analyse this basic capture file and determine what kind of attack it could potentially be. My initial instincts were that it would be a DoS attack, with IP spoofing, as the MAC address on all the queries is the same, however the IP addresses vary and all the queries were sent within ~2 milliseconds. I also considered that it could be an authentication issue with the server, but this does not explain the varying IP addresses with same MAC.

Is my analysis that this is a DoS attack with IP spoofing correct?

What could the server do to protect against this abnormal behavior?

Capture File: https://ufile.io/xbwmtzjm