One of Level 3's public DNS servers is 4.2.2.3. This is further explained below.
<h3>What is public DNS?</h3>
Generally, A public DNS server is one that provides users with a wealth of information on the websites that are hosted on certain IP addresses.
In conclusion, 4.2.2.3 is a public DNS server operated by Level 3.
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Answer:network
Explanation: I got it right