[DNS Exercise 2.2] DNS Worksheet

Domain name to test: __________________________________  Query type: "A"

1. Start at any root server
	dig +norec @k.root-servers.net.  _____________________  a

2. Referral: what NS records were returned in the "authority" section?

Write them down.

3. Repeat your query for every NS record found in step 2.
Was the response a referral or a final authoritative answer?

Write the response down.

a) Did every server respond?
b) Were the responses the same?

4. If step 3 was a referral, repeat again for every NS record found.

Write the responses down.

a) Did every server respond?
b) Were the responses the same?

Continue for further referrals if necessary.

5. Checklist:

a) Did all the nameservers give a response?
b) Did they all give either a referral to a subdomain, or an AA (Authoritative
   Answer)?

c) Were all the answers from each group of nameservers the same?
d) Did each group consist of at least two nameservers on two different networks?
e) For the final set of authoritative servers: did the list of NS records in the
f) Authority Section match the list of nameservers in the referral from above?
g) Were the TTL values reasonable?