Linux Administration Handbook, Second Edition

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15.19. Exercises

E15.1	Explain the function of each of the following DNS records: SOA, PTR, A, MX, and CNAME.
E15.2	What are glue records and why are they needed? Use dig to find the glue records that connect your local zone to its parent.
E15.3	What are the implications of negative caching? Why is it important?
E15.4	Create SPF pseudo-records for your site to help control spam.
E15.5	What steps are needed to set up a new second-level domain? Include both technical and procedural factors.
E15.6	What is the ...

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