Stevens Institute of Technology - Department of Computer Science

CS615 Pre-Lecture Questionnaire - DNS

Please help us make this class as productive as possible by filling in this short pre-lecture questionnaire.


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What protocol and well-known port does the DNS typically use?

Specify four DNS record types (RRs) besides A and AAAA.

How many top-level domains are there?

How many 'root servers' are there? Provide at least two IP addresses.

When/why do we use TCP instead of UDP?

On a caching resolver, what is the first query when it tries to resolve www.cs.stevens.edu?

On a caching resolver, what is the first query when it tries to resolve 155.246.56.11?

What threats do DNS-over-TLS and DNS-over-HTTPs address that DNSSEC does not?