* Request domain name, e.g. www.google.com
* Request type, e.g. A (which stands for IPv4 record), AAAA (IPv6 record), NS, MX, TXT, etc.
* Transport protocol on which the request arrived, i.e. TCP or UDP
* Client's AS (autonomous system or ISP), e.g. AS15169
* User's geolocation information: i.e. geocode, region ID, city ID, and metro code
* Response code sent, e.g. SUCCESS, SERVFAIL, NXDOMAIN, etc.
* Whether the request hit our frontend cache
* Whether the request hit a cache elsewhere in the system (but not in the frontend)
* Absolute arrival time in seconds
* Total time taken to process the request end-to-end, in seconds
* Name of the Google machine that processed this request, e.g. machine101
* Google target IP to which this request was addressed, e.g. one of our anycast IP addresses (no relation to the user's IP)